Hi all, I'm hoping someone can come up with some ideas on what might be happening in my tank. I've got a newly cycled 10 gallon tank, added 8 Green Dwarf Rasbora (Kubotai) juveniles on Saturday afternoon, and they've been dying one per day pretty much. this morning there is just one little guy left, and I'm assuming he's not going to last either (although he's outlived the rest, so who knows). They haven't shown any obvious signs of illness, although to be fair, they are super tiny, so it's hard to really get a good look at them. They are a bit less than a centimeter long, although varying in size, but pretty close to that. The tank was fishless cycled using pure ammonia, cycle completed about a month ago. As I was waiting for a specific fish to arrive at my lfs, I didn't stock the tank until this past Saturday, and had been feeding it pure ammonia to keep the cycle going. Before these new fishies were put in, I did 3 70% water changes every other day for 3 days leading up to their arrival. When they went in the tank, parameters were (and still are this morning) Ammonia 0, Nitrite 0, Nitrate 5, using API master test kit. So the first fish to go was on Monday night - found him on the gravel about 2 hours after noticing he was separate from the group and hanging around near the bottom at feeding time. So from the time I noticed he wasn't acting like the rest to when he died, probably a few hours. The rest that have died have all gone the same way - swimming away from the main group, then hanging near the bottom, eventually laying on the bottom and then dying. I'm using Prime with water changes, have done a couple of pwc on Monday after pulling out the dead one, and on Wednesday as well, only 2 gallons changed. Before they went in the tank, with the last wc, I put a bit of Flourish in for the plants (Water Wisteria, Java Fern, Java Moss, Moneywort) and when I bought the fish I also bought a moss ball and 2 Buce plants (all were in separate tanks in lfs). What is killing these fish? I acclimated them properly - floated the bag, tested the Ph (store water was 7.4, my water 7.8) and carefully added a few spoonfuls of tank water to the bag every 5-10 min over an hour. Temp matched at 76 degrees. Haven't added anything else to the water since then other than Prime and a few drops Vitachem. Is it possible I just got a 'bad batch' of fish? I know they were tank raised, not wild caught. Were they too young? What could be going wrong here? It seems weird to me that if something was 'bad' in the tank that they wouldn't all die at once. Any thoughts, advice would be greatly appreciated. I'm super sad and frustrated, I spent 2 months setting up and fishless cycling this tank and it's all falling apart this week.