Cleaning fish can eat turtle's feces, but he doesn't eat much, because as a cleaning fish, cleaning fish can not only clean algae in the tank, but also clean feces and food residues, but he won't eat feces when there is enough food.
Scavengers are omnivorous fish, which suck algae, benthos and garbage in the water, and can also swallow fish eggs and fry in large quantities. In the aquarium, it is often adsorbed on stones and glass to stabilize the body, suck algae and look for benthic animals (such as water worms). It is a loyal "cleaner" in the aquarium.
Catfish also eat feces, but they don't eat much and pull a lot. Moreover, it swims slowly in the water and is easy to be bitten by turtles. Catfish eat turtle excrement when there is no food to eat.
Grass goldfish also eat turtle droppings. When the turtle's excrement can't be sucked by filtration, you can put a few grass goldfish to clean it up. But if it's an aggressive turtle, it's best to separate them first to avoid biting the grass goldfish.
It is suggested to change the water in the turtle part, and it is not necessary to change the water in the whole tank unless the water in the tank and the surrounding area are dirty. When partially changing water, use a plastic small tube to suck out the dirty water at the bottom by siphon principle, and then add fresh water with the same capacity (that is, tap water that has been dried for 2 days) into the tank. Generally, the water depth of soft-shelled turtle is slightly higher than that of turtle back, so it is not necessary to be too deep (of course, some turtle friends need or like high water level when using filters). It is best to provide a stone above the water surface for the tortoise to climb and bask in the back; The tortoise needs sunshine. If you keep it indoors, you should bask in the sun for more than ten minutes every day.