Ok, I have a 64 gal hex tank. I have a whisper power filter with an undergravel system as well. I have created a very aggresive tank, Dinosaur eel, clown knife, rainbow shark, upside down cat, and tiger barbs. The tiger barbs keep trying to run the tank. They even try picking on the knife, I think that will stop as he grows. Now here is my problem, I had six tiger barbs. The I came home from work and two were dead. I got replacements (due to warranty from pet store). One of them died the next day. I checked my water, everything is normal. Then one started to lay on the bottom and acted like it was getting ready to die so I though that maybe I didn't have enough airin the water, so I adjusted the powerhead on the undergravel system to put out more air bubbles. All of a sudden all five barbs were swimming and playing like never before. That was last night, now I got two laying on the bottom getting ready to die. What do I do? Give up on having barbs? Should I add a bubble stone? Help me, please!
:help:
:help: