Alright had added some new livestock the other day noticed things were off a little with my fish. tested water chemistry ph 8.0, ammonia 0, nitrite 0, nitrate off he chart, did a 25% water change yesterday and tested today, ph 8, ammonia 0, nitrite 0.25, nitrate between 40-80ppm? I am stumped, fish are looking fine and eating good, LTA mouth is closed and its no expelling its insides, but has not anchored down anywhere and is occasionally floating around, he was a new addition a few days ago and alerted me to the problem as he was turning himself inside out. I am in the process of building a 29gal sump to replace the canister filter. my skimmer is working good and pulling a lot of sludge out. I just don"t know.