Hello! I'm looking for advice. We recently invested in two tanks (first a 26 gallon and second a 60 gallon). We started our first tank with a Pictus Catfish, Upside Down Catfist, a Red Tail Shark, an Albino Rainbow Shark, and 4 tiger barbs. In the 26 gallon tank, we lost 3 tiger barbs in 3 days. We tested our water again and all looked well. We thought we needed a bigger school so we bought 5 new tiger barbs after the first three died. In consecutive days, three more died. When we got the bigger tank, we moved all the fish over and the last two tiger barbs seemed to do better. But then another died. We kept researching compatibility, fish, water quality, etc. Everything I've read says tiger barbs are awesome and hardy so we thought maybe we just had a bad bunch. So two days ago we got six new large, bright tiger barbs. They seemed very happy, active - all seven barbs schooled together nicely and acted just like I'd expect. They made their presence know - nipping at everyone they came near. We quickly noticed our pictus catfish had gone into hiding. He'd previousy been the most active fish in the tank. This morning, I noticed that our Pictus' whiskers appeared to have been bitten off!!! It was devastating. My husband read that they'd grow back so I let it go. Then tonight, we came home and found that two of our barbs were dead :-( we can't figure out what's going on or why we can't keep tiger barbs alive. What do y'all think??? Any insight is greatly appreciated!!