okay for some of you guys who didnt read part one of this thread, I basically have a very irresponsible friend who is trying to keep fish. He has a 50 gallon tank with two oscars and he only changes the water once in every six months. He also has guppies inside of this glass of water with no filteration. I looked inside of it and there were about 4 still alive and 5 dead. He also has a very overstocked pond. He has ten koi and 20 goldfish in there. And the pond is only 4 feet wide in diameter! Anyways yesterday I went over to his house to help him change the water. When I put in the vacuum all of these huge peices of crap flying everywhere and his Chinese algea eater was having a siezure breathing really rapidly.I told him not to change that much of the water because the oscars may die, but he just won't listen to me! Sigh...... And the worst part is that he told me that if his oscars do die, he's gonna convert to sw!! He told me he's gonna add a flame angel fish a hippo tang, a mandarin goby, a emperor angel, a clownfish, and lots of corals along with an anemone