Newer tank been up 2 months... Fishless cycle Dr Tims ammonia and one and only a month before adding fish. have had 3 chromis and 2 pajama cardinals. They are all well and eating rods food and omega flakes. Bought 2 very young juvenile clownfish on Tuesday by Saturday both dead. Zero ammonia, nitrite or nitrate. Chaeto growing like crazy. Water temp 78.1. Is that common and just part of the hobby?