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Aquatic turtles: Care and feeding basics every Testudine enthusiast needs to know

The fundamentals of aquatic turtle care and feeding

Did you know the difference between turtles and tortoises is that turtles live at least partially in the water, while tortoises live exclusively on land? Both types make great pets, but caring for them can be a time-intensive task. If you’re considering buying an aquatic turtle, you should first know how to best take care of one. You certainly don’t want to bring a new turtle home and realize you’re in way over your head. Read on to learn the fundamentals of aquatic turtle care.

Small turtle with a strawberry
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What is the water vs. land ratio?

Most turtles spend some time on land; even sea turtles venture to dry ground to lay their eggs. Turtles do not need and should not have enclosures full of water. Small floating platforms that turtles can climb onto should suffice for turtles that spend most of their time underwater. However, some aquatic turtles enjoy exploring the land and need more of a dry area. Research the particular species of aquatic turtle you’re interested in to find out how much time they spend in the water compared to on land.

Pet turtle swimming in a tank

What should an aquatic turtle’s environment include?

Turtles usually don’t like to be handled and may bite. That means your new reptile will spend most of its time chilling out in its habitat. Their environment should be quiet, with the correct water temperature, lighting, and filtration system. It is vital to their health and well-being for their environment to mimic the dwellings of turtles in nature. Your tank should include the following:

  • Plenty of space: First and foremost, you will need a tank of sufficient size to allow your turtle room to swim freely. Individual turtles need at least a 40-gallon tank filled with chlorine-free filtered water.
  • Clean water: Because turtles eat and defecate in their water, they need a filter to prevent the waste from polluting the tank. In addition, you’ll need to empty and clean the tank with a bleach solution at least once weekly.
  • A basking lamp and heater: The habitat will require a basking lamp and a submersible heater to keep the water cooler at one end than the other. A platform at least partially out of the water is necessary, preferably with a ramp to create a shallow area for basking. Turtles need exposure to an incandescent and UV lamp or direct sunlight for 10 to 12 hours daily for optimum health.
  • Extras: You can put gravel or stones at the bottom of the tank as long as they are big enough that your turtle won’t try to eat them. Only one turtle species should live in any given tank, but most can coexist with some fish.
Two turtles sun on a log in the water
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What do turtles eat?

All turtles (but not all tortoises) are omnivores, meaning they eat both plants and meat. Aquatic turtles can eat a variety of foods, though they can survive on a diet of commercial turtle pellets and frozen or dried fish food. Alternatively, you can feed fresh foods to a turtle. Foods that are healthy and safe for turtles include insects like grubs and crickets, earthworms, small fish, and dark leafy greens such as kale and collard greens. Adult turtles only need to eat three to five times per week, and baby turtles may need to eat up to twice a day. In addition, turtles need a calcium supplement, usually in the form of a powder, dusted on their food two to three times per week.

Two turtles eating kale
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What are the signs that a turtle is sick?

Aquatic turtles can live upward of 20 years, so anticipate having your shelled friend for quite some time! Healthy turtles should be active and alert, eat regularly, have a hard shell and clear skin free of lesions, and have clear eyes and nostrils. Note that turtles shed their scutes (plates that make up their shells) periodically.

These are some telltale signs that your turtle is unwell:

  • Hyperactivity or lethargy
  • Discharge from the eyes, mouth, or nose
  • Discoloration or growths on the shell or skin
  • Sneezing
  • Not eating
  • An overgrown beak
  • Abnormal feces

If you notice any of these symptoms, take your turtle to the vet as soon as possible. Calcium deficiencies are relatively common in aquatic turtles, hence the recommendation to supplement their diets with calcium. Turtles often carry salmonella, which can be transmitted to and cause illness in humans. Always wash your hands after handling turtles or parts of their enclosure.

A turtle swimming in a tank
Image used with permission by copyright holder

Though they may be tedious to care for, having an aquatic turtle as a pet is a rewarding and interesting experience. The various species of turtles have slightly different behaviors, so be sure to pick one that fits your personality. Soon, you’ll have a reptilian buddy to enjoy!

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5 warning signs your turtle is sick
Person holds turtle in hands

The good news: Turtles can live for up to 50 years in captivity and will stay "young" for decades. That means you can enjoy many, many years of fun with your reptile and not worry about her passing too young. However, as with any pet, you should check her frequently for signs of illness. Even animals with this type of longevity can get sick, and you definitely don't want anything shortening her impressive life span. Check her for these sick-turtle symptoms to ensure she makes it to a ripe old age.

How to tell if your turtle is sick
Hopefully, you find a vet when you first bring your new pet home and get regular checkups. Certain symptoms should trigger you to make that call sooner than the annual visit, though. Turtles aren't as expressive as mammals or birds and so can be harder to read. Be sure you're checking your animal weekly for any signs of distress, perhaps during a regular feeding or cleaning day.
Runny nose
Just like us, turtles get respiratory illnesses. You might see some snot, cloudy eyes, or breathing difficulties. Oftentimes, these infections are actually signs of a bigger problem like a vitamin deficiency or a poorly constructed environment. Basically, your pet will be much more likely to get sick if everything else isn't working in her environment. A reptile doctor may help diagnose the deeper issues while you get meds to take care of the immediate problem.
Disfigured shell
While turtles generally prefer to be hands-off, you should examine your pet every so often. Pay particular attention to the shell, as that will be a good indicator of many issues and diseases. Notice if it feels too soft, is bleeding, or has cracks. Shell cracks often occur when your turtle winds up in a dog's mouth or crushed under an object. So, sometimes you'll know right away that damage has been done. Of course, this requires an emergency visit to the doc but can often be repaired. Alternatively, a general softness or a discoloration usually means an issue with diet.

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Even the ancient Romans thought hedgehogs made great pets, and they're still popular household companions today. Luckily, these spiky critters don't require too much expertise to keep satisfied, though they do have a seemingly endless supply of energy. As with any pet, there's some preparation that will go into hedgehog care, but they can make a fun and interesting exotic pet if you get it right.

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Interested in a saltwater aquarium but not looking to raise a Nemo? Seahorses make a great aquatic pet for anyone who wants to try something different. These tiny and majestic creatures actually belong to the fish family, but you'll surely notice they don't resemble the usual pet swimmer. With a head shaped like a horse's, a small pouch for their young, and a prehensile tail, they could potentially be known as sea monkeys or sea koalas. While you'll certainly enjoy watching your new seahorses swim gracefully in their tank, these guys can be a bit finicky and need a vigilant owner to consistently keep their aquarium at the perfect temperature with high water quality. Here's how to make sure your new sea-koala-monkey-horse stays happy.

Should you get a seahorse?
Seahorses come in more than 40 species but only a few that we can keep as pets. The setup for their habitat will be extremely similar to other saltwater tanks, and aquarium pros will enjoy branching out into this different type of fish. Let's face it, the big appeal of seahorses is the mega cuteness and the fun you get watching them. In addition to the usual tank setup, you'll need a hitching post for your new pet to wrap his fingerlike tail around. For extra fun, install a plant instead that he can catch onto. On the flip side, you have to be extremely careful that he won't accidentally catch on any other part of the tank like a piece of your filtration system. Because seahorses in aquariums can live up to five years, you'll need to ensure you're ready for the commitment. 

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