Oh and you want to know about bioload, eating ratio;
Cories, depends on the type but most have a small bioload, compared to how much food they eat.
Bristlenose, not really a bottom feeder, But i see why someone would vote them. The poop a lot just like any other pleco, but they eat most types of algae and they are pretty good to have a group if you have the space. Males fight, But not if you have a very large tank and tons of females.
Commons, are crazy, they get big poop a lot and usually stop eating algae in a home aquarium. Not really a bottom feeder either.
Ghost shrimp, awesome little shrimp. Whiskers are food also. Their poop almost doesnt even count in stocking a tank. If I could vote twice, They would be my second vote.
Snails, not great. Eat a lot if they even find it. They poop a lot as well.
Loaches, depends on type. Most are some what middle swimmers, but khulis and some other types stay on the bottom. Their bioload is sort of average, not to much not incredibly small. They eat quiet a bit.
Bamboos, small bioload, but not a bottom feeder.
Crayfish, average bioload. Cuz all crayfish have a pretty small bioload, usually. But for a crayfish, it would be big, for a fish it would be small. They eat anything, even fish.
Pictus cats, poop a lot cuz they eat a lot!
Chinese algae eater, nasty little thing, but sometimes you get lucky. They dont eat algae and eat snails and suck slim coats of fish, i heard. Their bioload is okay I believe.
Otos, not a bottom feeder, a true algae eater. Their bioload is pretty small.
Glass cats, not a bottom feeder. But their bioload isnt that much, for how big they get.
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