There has to be something else wrong with my fish. I have a ten gallon. Ammonia hasn't gone past .25 and everything else is where it should be. My kh is really low, but the guy at my pet store said it wouldn't matter. I've had my tank for about a month and didn't know about the cycling process, so I added fish. All died except one (vicky) she's still here...somehow. after getting my water fine and making sure everything else was good, I went and got a few more guppies a pleco and ghost shrimp. So 3 female guppies, 2 males, 1 pleco, 4 ghost shrimp and some guppy fry. They were fine at the pet store, swimming around all happy...bring them home, BOOM they just sit at the top or bottom not moving hardly at all. One pregnant one I have sits on the gravel and I swore she was dead because she wasn't even breathing...pretty sure she's not going to make it. I just want to give up...is it some sorta disease?