Hey everyone, I have a large Pleco - approx 12 inches, in a 90 gallon tank and have been having trouble with a snail infestation. Unfortunately I let the cleaning go too long recently, which resulted in the snails infesting the filters themselves which resulted in them not working properly. I've had my Pleco for almost 20 years, and we noticed two days ago that he was on his side and breathing extremely heavily. Prior to that, he'd started darting to the top of the tank and gulping air. When I searched that, everything I saw said that was not uncommon with plecos. When he took a turn for the worse, I tested the water and the nitrates were really high. Did a water change and got a powerhead and a new air pump to increase the aeration - but it doesn't seem to really be helping my pleco. He's still alive, but seems to be barely hanging on - only way we've been able to tell is when we picked him up to see if he was still alive. The only thing we see is he'll still move his mouth a bit. We did a chlorophyll bath this morning, and am going to do another one in an hour or so - as that's the only suggestion we've seen that could help. Does anyone else have any suggestions? Thanks again.