LOL it is a paper shredder! and I do about a 30-40% water change a week. I am very saddened by it but I sold my FRT who was getting pretty big and her bioload must have been a lot compared to even bigger fish. I also have 3 armatus that were in there but I had to take them out cause the damn biggest gar was grabbing them and cutting them and ripping fins so I am powerfeeding them to get them bigger in another tank for a bit but so far I still have em