Get a red eyed tree frog’s care right and the payoff comes after dark. During the day the frog stays tucked under a leaf, legs folded, doing its best impression of a lump. Once the lights drop and the evening mist beads up on the glass, it unfolds, opens those absurd red eyes, and starts stalking a cricket across a cork branch. That is the whole appeal of the species. You do not handle these frogs. You build a slice of rainforest and then get to watch it come alive after dark.
This guide corrects the care sheets that still circulate, including the one that used to live on this page. A few of their claims matter: the humidity targets are set too low and UVB gets waved off as optional. Worse, the tank-size advice would have you cramming four frogs into a tank that’s too short for one. We’ve fixed all of that below. Whether you’re deciding on your first frog or you already have one and something feels off, this covers the real day-to-day.
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Are red eyed tree frogs good pets? An honest take
Let’s set expectations before you spend a dollar.
Red eyed tree frogs (Agalychnis callidryas) are gorgeous and genuinely fascinating to keep. They’re also not a beginner’s first-ever animal in the way a corn snake or a leopard gecko might be. We’d call them intermediate. Nothing about the care is hard once it’s dialed in, but they punish neglect fast because their skin is permeable and they react quickly to bad humidity, bad water, or heat.
Here’s the reality check:
- They’re display-only. These are look-don’t-touch frogs. Their skin absorbs whatever’s on your hands, and handling stresses them. Most keepers handle them only a handful of times a year, to move a frog during a deep clean, and always with wet, freshly rinsed hands.
- They’re nocturnal. During the day your frog is a green blob glued to a leaf. If you want an animal that does stuff while you’re awake, you’ll be disappointed. The show starts after lights-out.
- They’re small and fairly short-lived. Adults hit about 2 to 3 inches (females larger than males). Typical lifespan in captivity is around 5 years, sometimes 8 to 10 with excellent care.
- They need a routine. Twice-daily misting, or an automated system that does it for you. Skip it and humidity crashes.
Who should get one: someone who likes the idea of a planted rainforest tank they maintain and observe, and who’s fine with a hands-off pet. Who should skip it: anyone wanting a frog to hold, anyone who travels constantly with nobody to mist, or anyone hoping for a cheap, low-effort starter animal. If the hands-off part bothers you but you still want a tree frog, a White’s tree frog is chunkier, mellower, tolerates the occasional gentle handling, and lives much longer. It’s the sensible alternative for beginners.
One more thing worth clearing up because people search for it: a “red eyed green tree frog” almost always means this species, callidryas. It is not the American green tree frog and not the Australian green (White’s/dumpy) tree frog. Same “green tree frog” nickname, completely different animals and care.
Red eyed tree frog tank setup and enclosure
This is where the old advice does the most damage, so this section is specific.
Go vertical. These are arboreal frogs. In the wild they live up in foliage above water, and in captivity they want to climb, not roam a floor. That means height beats floor space every time.
The size that actually works: an 18x18x24 inch (length x width x height) front-opening glass terrarium is the sensible minimum for one or two adults. That’s roughly 29 to 33 gallons of volume, but the gallon number matters less than the dimensions for an arboreal species. Think in dimensions. The 24 inches of height is doing the real work.
If you want more than two frogs, add about 10 gallons of volume per additional frog, and scale up the footprint too. The old “15-gallon tank holds up to four adults” line is both undersized and crowded. Please don’t.
Front-opening matters more than you’d think. Reaching in through a top lid means looming over the frog from above, which reads as “predator” to a prey animal. A front-opening door lets you service the tank from the side and stresses them far less. The standard 18x18x24 glass terrariums from Exo Terra and Zoo Med both open at the front, which is why they’re the ones most keepers compare.
Screen top, always. You need a tight-fitting screen top for two reasons. First, these frogs are escape artists and will find any gap. Second, some airflow keeps the tank from going stagnant and moldy. The trick is balancing that ventilation against humidity, which we’ll get to.
If you want a general setup list to cross-check against as you build, the terrarium setup checklist is a good companion to this section.
Substrate
You want something moisture-retentive and safe if a stray bit gets swallowed with prey. Coconut fiber (the compressed brick kind you hydrate) or moistened sphagnum moss are the two standbys. Both hold humidity well and look natural.
Keep it damp but not swampy. If you press it and water wells up, it’s too wet. Avoid gravel, sand, or anything sharp or ingestible that could cause impaction.
A lot of keepers eventually go bioactive: a drainage layer at the bottom, then substrate, then leaf litter on top, seeded with springtails and isopods as a cleanup crew that eats frog waste and mold. It’s more work up front and worth it long-term because the tank largely cleans itself. If you’re weighing coco fiber vs sphagnum vs a full bioactive build, the substrate comparison guide breaks down the tradeoffs.
Decor and plants
Give them vertical structure at varying heights: sturdy branches, cork bark rounds and flats, and vines. Broad-leaf plants are the key detail, because these frogs sleep pressed flat against a leaf during the day. Pothos is bulletproof and cheap. Bromeliads look the part and hold little pockets of water. Live plants also help buffer humidity. Artificial plants are fine too if you don’t want to keep anything alive; just make sure everything is secured so it can’t shift and pin the frog.
Tank size, environment, and habitat conditions
The environment is 80% of red eyed tree frog care. Get temperature, humidity and water right and most problems never appear.
Humidity: 60 to 80 percent, with spikes
This is the correction that matters most. The target is 60 to 80 percent ambient humidity, with a spike toward 100 percent right after misting that then dries back down before the next cycle. Older sheets saying 50 to 70 percent run these frogs too dry.
The dry-down is not a flaw, it’s the point. A tank that sits pinned at 95 to 100 percent all day with no drying phase is a mold and respiratory-infection factory. You want a rhythm: wet, then drying, then wet again.
A good routine: mist twice a day, once in the morning and once shortly after lights-out (they’re most active at night, so the evening mist is the one they actually drink from). By hand with a pump sprayer this works fine if you’re home and consistent. If you travel or forget things, automate it.
Two kinds of gear get confused here, so be clear on the difference:
- A misting system sprays actual droplets onto leaves and glass. That’s what the frog drinks from and what raises humidity fast. A pressurized system like MistKing is the gold standard, dead reliable and fully programmable. The Exo Terra Monsoon (around a 2-gallon reservoir, ships with a couple of nozzles, expandable) is a solid mid-range pick, and the Zoo Med Repti Rain is the budget option.
- A fogger (Exo Terra Fogger, Zoo Med ReptiFogger) pushes out ultrasonic fog. It looks fantastic and nudges ambient humidity up, but it does not put drinking droplets on surfaces the way a mister does. Treat a fogger as a supplement for ambiance, not a replacement for misting.
If you can only buy one, make it a mister, not a fogger.
Measure with a digital probe hygrometer with the probe sitting mid-tank, not one of the cheap stick-on dials, which are wildly inaccurate. Humidity is the single make-or-break variable with this species, so if you want to go deeper on measuring and holding it steady, the humidity and moisture control guide is worth reading in full.
Misting systems on Amazon · Digital probe hygrometer/thermometer
Temperature: 72 to 78 with a gradient
Aim for an ambient of about 72 to 78°F during the day, with a warm zone up toward the low 80s if the frog wants it. Nights can safely drop to 66 to 72°F, and that natural dip is good for them. The old 72-80 day / 65-68 night numbers aren’t disastrous, but they miss the gradient idea and clip the night range a bit tight.
What you’re building is a thermal gradient, warmer up top and near one side, cooler lower and on the other, so the frog can move to the temperature it wants. Don’t make the whole tank one uniform temperature.
The honest truth for a lot of homes: these frogs are cool-tolerant, and if your room sits around 72 to 75°F you may need very little added heat at all. If you do add heat, a low-wattage overhead bulb or a heat mat mounted on the side of the glass works. Never put a heat mat under a moisture-heavy substrate, because it bakes the wet coco into a stagnant mess and can crack glass. Whatever heat source you use, run it through a thermostat and watch it with a digital thermometer. Sustained temperatures above about 82 to 85°F are dangerous. Overheating kills these frogs faster than cold does. For wiring up a safe thermostat-controlled gradient, see the heating and temperature guide.
Water quality and pH
People search “red eyed tree frog pH,” and the practical answer is that you don’t need to chase a specific pH number. What you need is the right kind of water, because this is where a lot of frogs quietly get poisoned.
- Use dechlorinated tap water (treat it with a reptile water conditioner that removes chlorine and chloramine) or plain spring water. These are what you mist with and what fills the bowl.
- Do not use distilled or reverse-osmosis water. It sounds “pure,” but it’s stripped of the minerals and salts frogs absorb through their skin, and long-term it can throw off their electrolyte balance. This trips up well-meaning keepers constantly.
- Never use untreated tap water. Chlorine, chloramine and fluoride are all harmful to amphibian skin.
The water bowl itself must be shallow. Red eyed tree frogs are poor swimmers and can genuinely drown in a deep dish. A wide, low dish they can sit in and climb out of easily is what you want, and change the water daily because they’ll defecate in it.
Lighting and UVB
The old advice that UVB is “not strictly required” is outdated, and it directly contradicts the calcium-supplement advice, so we’re correcting it.
Provide low-output UVB. A bulb in the 2.0 to 5.0 range (something like a Zoo Med ReptiSun 5.0, or one of Arcadia’s low-UV / ShadeDweller lines) supports vitamin D3 synthesis, which is what lets the frog actually use the calcium you dust its food with. Yes, they’re nocturnal and get some UV even in shaded rainforest; low-output is the point, you’re not blasting them. Position it so the frog can move into shade if it wants, which the plants and cork bark provide.
Run a 10 to 12 hour photoperiod on a timer so day and night are consistent. And the part people forget: replace the UVB bulb every 6 to 12 months even though it still lights up. UV output decays long before the visible light does, so a bulb that “looks fine” at 18 months is putting out almost nothing useful. If UVB output, bulb types and replacement schedules are new to you, the UVB lighting guide explains the whole thing.
Low-output UVB bulbs on Amazon
Feeding your red eyed tree frog
They’re pure insectivores, and the diet is simpler than the internet makes it look.
Staples: appropriately sized crickets and dubia roaches. That’s the backbone. Both gut-load well (more on that in a second) and are the right shape and size.
Occasional treats only: mealworms and waxworms. The old guide listed these as routine “variety,” which is a mistake. Mealworms have a hard chitin exoskeleton that carries an impaction risk, and waxworms are basically candy, high in fat. Offer them rarely, if at all. They’re a treat, not a food group.
The size rule: no prey larger than the space between the frog’s eyes. Bigger than that and you risk choking or impaction. When in doubt, go smaller.
Gut-load and dust. Two separate steps that both matter:
- Gut-loading means feeding your feeder insects something nutritious (leafy greens, commercial gut-load, carrot) for a day or two before they go in the tank, so the frog eats a nutrient-packed bug instead of an empty one.
- Dusting means coating the insects in supplement powder right before feeding. Use a calcium with D3 powder at most feedings, plus a reptile multivitamin every week or two. This is the other half of the UVB story, and skipping it is the fast track to metabolic bone disease.
Schedule: feed juveniles daily, and adults every 2 to 3 days. Always feed at night, when they’re awake and hunting. Feed after the evening mist and stay to watch, partly because it’s the best part and partly to remove anything uneaten. Loose crickets will nibble a sleeping frog, so pull stragglers out after a couple hours.
For the deeper mechanics of gut-loading, dusting ratios and feeder nutrition, the feeding schedules and nutrition guide goes further on the specifics.
Red eyed tree frog supplies checklist
Everything you actually need, in one place. Prices are ballpark for context, not quotes.
- 18x18x24 front-opening vertical terrarium (Exo Terra or Zoo Med). The single biggest line item.
- Misting system (MistKing / Exo Terra Monsoon / Zoo Med Repti Rain), or a good pump sprayer if you’ll mist by hand reliably.
- Digital probe hygrometer + thermometer. Not stick-on dials.
- Low-output UVB bulb (2.0-5.0) plus a fixture and a timer.
- Low-wattage heat source only if your room runs cool, always on a thermostat.
- Substrate: coconut fiber or sphagnum moss, or a full bioactive kit with drainage layer, leaf litter and a springtail/isopod cleanup crew.
- Branches, cork bark, vines, and broad-leaf plants (pothos, bromeliads) at varying heights.
- Shallow water dish.
- Water conditioner / dechlorinator.
- Calcium + D3 powder and a reptile multivitamin.
- Feeder insects: crickets and dubia roaches, plus gut-load for them.
That’s it. No heat rock (dangerous), no deep pool, no sand.
Common mistakes and health issues
Most illness in this species traces back to a husbandry slip. The good news is that means most of it is preventable.
- Running too dry. Humidity parked at 50 percent leaves them dehydrated, with tight-looking skin and lethargy. Fix the misting.
- Running too wet with no dry-down. The opposite problem. Constant 95 to 100 percent with poor ventilation grows mold and drives respiratory infections (listen for open-mouth breathing or a whistling sound). You want that wet-then-dry rhythm, not a permanent swamp.
- Overheating. Sustained temps above the low 80s stress and can kill them fast. Watch your thermostat in summer, and don’t put the tank in a sunny window (glass tanks cook like a car).
- Distilled or RO water. Slow poisoning by mineral depletion. Use dechlorinated tap or spring water.
- Deep water. They can drown. Keep the dish shallow.
- Metabolic bone disease (MBD). From no UVB and no calcium/D3. You’ll see soft or bent limbs and a rubbery jaw, sometimes with tremors. Prevent it with the UVB bulb and dusting, together. Once it’s advanced it’s hard to reverse.
- Poor ventilation. Stagnant air plus high moisture equals mold and infection. That screen top earns its keep.
If something looks wrong (weight loss, a frog that won’t eat for a week or more, skin discoloration, labored breathing), find an exotics or reptile-and-amphibian vet. Amphibians hide illness well, so by the time it’s obvious, it’s usually not early.
Where to buy and what to expect
Buy captive-bred, not wild-caught, every time. Wild-caught frogs tend to arrive stressed and carrying parasites, and collecting them is hard on wild populations. Captive-bred animals from a reputable breeder or a specialist amphibian shop are healthier and better acclimated, and they cost only a little more. Expect to pay somewhere in the 20 to 60 dollar range for the frog itself.
On total cost: a proper first setup runs roughly 300 to 500 dollars once you add up the terrarium, misting, lighting, substrate, decor and monitors. After that, ongoing costs are modest, maybe 20 to 40 dollars a month for feeders, supplements and the occasional bulb or substrate refresh. The frog is cheap. The habitat is where the money goes, and it’s not worth cutting corners on.
The bottom line
A red eyed tree frog is a fantastic pet if you go in clear-eyed: it’s a nocturnal display animal you watch rather than handle, and it rewards you with one of the most striking little creatures you can legally keep in a living room. Nail the environment (a tall 18x18x24 tank, 60 to 80 percent humidity with a real dry-down, 72 to 78°F with a gradient, clean dechlorinated water in a shallow dish), give it UVB and dusted feeders, and you’ll have a healthy frog that greets every misting like it’s the first rain of the wet season. Get lazy about humidity and water, and it’ll tell you fast. Build the rainforest first, then add the frog.
Related reading
- White’s Tree Frog Care Guide: the hardier, longer-lived, more handleable tree frog to compare before you commit.
- Reptile Humidity and Moisture Management: going deeper on the one variable that makes or breaks this species.
- Reptile UVB Lighting Complete Guide: bulb types, output, and why you replace them every 6 to 12 months.
- Reptile Heating and Temperature Control: building a safe thermostat-controlled gradient.
- Reptile Substrate Comparison: coco fiber vs sphagnum vs bioactive, side by side.
- Reptile Feeding Schedules and Nutrition: gut-loading, dusting, and feeder-insect nutrition in detail.
- Reptile Terrarium Setup Checklist: a general build checklist to cross-reference as you assemble the enclosure.