Why wont they stay alive?

[MistersMom]

its a 20 gallon, and ten gallon, common pleco, and algae wafers.

[Mo]

Aquarium size. Wayy to small for a common Pleco. Substances such as ammonia would build up very quickly and even though your bettas may seem fine I've seen bettS act "normal" in ammonia high levels that would negatively effect Pleco

[MistersMom]

ohhh..... okay. what about the snails? and honestly every time i get a pleco its one i feelbad for... that may be a main contributer, that i bring it home half sick...

[LebronTheBetta]

Snails, too. They produce A LOT of ammonia, more than Bettas! Did you add AG Salt in? Aquarium salt is not supposed to be in the tank more than 10 days as the Betta's labyrinth would get injured.

[djembekah]

also salt like they said, not good for scaleless fish like a pleco. pretty sure they fall under the "armored catfish" categroy

[MistersMom]

okay, salt not good for scaless fish....

[TheCrabbyTabby]

Yeah. I would highly recommend using either aquarium or epsom salt ONLY when treating a scaled fish, like a betta, for a disease like fin rot and ONLY for a short period of time and ONLY in a separate tank from any scaleless fish and snails. Other than that, its not needed.

[MistersMom]

okie dokie! thank you.