Fish that eats wastes in Aquarium

I don’t think that there are any animals that specifically eat the waste from another animal. Many think that snails or shrimp do, but what they really are doing is picking apart the waste for the uneaten parts of food to consume.

Same can be said for catfish or algae eaters, as they are looking for the pieces of food that nah gather with waste but aren’t specifically waste.

Maybe snails if you want some things to be extra clean or shrimp - but that won’t eat waste if their own waste they create.

Maybe Tilapia...but then that becomes a question of how big is your "tank".

I don’t think there is a fish that eats just waste. Snails and shrimp will shift through the waste to find the leftover food, but I don’t think a single thing eats just pure waste outside of bacteria.

I like snails for this.