Well, I found that my filter was clogged and was not doing it's job properly. So when I went and got the water tested the nitrates were high as anything.... All in all, it was one horrible week. Lost five angels, a black kuhli, and every last neon. I could kick myself. I should've looked at the filter when the first angel died..but everything had seemed fine. Grr..... it just really ticks me off, they were all very nice angels, and I had the sweetest little Kuhli, the little guy was so friendly too. I check every dead fish, no scales missing, frayed or nipped fins, blood, or anything...they just slowly succumbed to the horrid water. Well, just wanted to let you all know that...I said I would kick myself if I found out anything was wrong with my water, and trust me, I kicked myself HARD. Learn from my mistakes, I make plenty of 'em.