u/LadyTaylorTot

My oranda, Aphrodite, is swimming weird. She is floating upwards slowly at a vertical angle. I performed a big water change last night and cleaned the tank because it was having a problem with cyanobacteria (I went on a trip and the person I had watching her overfed). I only cleaned the filter, didn't replace. Is this swim bladder or something else? What do I do? I am so worried.