🐢 How to Set Up an Aquatic Turtle Tank
Aquatic turtles like red-eared sliders get surprisingly large and need a lot of water — a rough guide is 10 gallons per inch of shell, which means a 75 gallon or larger tank for a grown adult. They spend their lives swimming, so floor-and-water space is key.
They need a dry basking dock. Turtles haul out to dry off and warm up, so provide a sturdy basking platform under a heat lamp (around 90°F) and a UVB bulb — UVB plus basking prevents soft-shell and bone disease. A water heater keeping the water near 78°F suits most species.
Plan for a lot of filtration. Turtles are messy eaters, so use a canister or filter rated for two to three times your tank volume, and do regular water changes. See our aquarium setup guide for water basics.
🛒 Recommended supplies
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🧽 Cleaning & maintenance
Aquatic turtles are messy — they eat, poop, and stir up debris constantly — so maintenance is the real work of turtle-keeping. Run an oversized canister filter and still plan a 25–50% water change every week, vacuuming waste and leftover food off the bottom with a siphon and refilling with dechlorinated water near 78°F. Wipe algae off the glass and scrub the basking dock, which gets slimy. Feeding your turtle in a separate tub of tank water keeps the main tank far cleaner. Test the water regularly (ammonia and nitrate climb fast in turtle tanks), rinse filter media in old tank water only, and never tear the whole tank down at once — you would wipe out the good bacteria. Wash your hands well afterward, since turtles commonly carry salmonella.
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