Strange Deaths

[Sinnamingrrl]

Its a sad day in my aqarium, and I will be following up with my LFS tommorow, but I wonder if anyone else knows what is going on here. I have a 33 Gallon Tall Tank. Fluval 3Plus submerible filter. A fairly agressive bubble maker, some fake plants, a piece of wood purchased from the LFS. Tested my water 2 times in 1 week and all conditions seem perfect. 1 week ago I had 7 white clouds in the tank, they had been living there happily for about 3 months. Last week I purchased an Ancistrus and 6 Guppies. I floated everyone and eventually released them. 4 days later, I noticed that one of my guppy's has both of his eyes go very large and black and he is acting very eratic. I wondered if the bubble maker was stressing him out. I turned it off. The next day, I tested water again, all good. HOwever, I had 2 dead white clouds and now another guppy with both eyes enlarged and black. The 2 bug-eyed guppies are now hanging out at the top of the tank looking like they are needing some air. Whats going on?

[msjinkzd]

Did you test your ammonia, nitrite,and nitrate? What are those readings? I would initially suspect that increasing the amount of fish is causing a mini-cycle in your tank which is having adverse effects on your fish. Do any of the other fish have symptoms?

[ChrisK]

Test your water with a good liquid test kit for ammonia, nitrite, and nitrate. You probably are still cycling and need to know these levels.

[gmh]

Could be popeye. Can you provide a pic? First thing to do is an immediate large water change.