I have a 40 gallon tank with a power-head, filter, live rock, sand ect.. My tank has been up and running for about a month and a 2 weeks now. I started off with 3 Green Chromis, A pair Snowflake Clowns, 2 snails, and 4 hermits. Everything died in about 6 day except hermits and snails. So I waited a week before I'v gotten Royal Grammar, another pair of SF Clowns, and 3 more Chromis. All died except 1 small Chromis like 1/2 inch. So I slowed down and just started with chromis again I had 4 for about 5 days now and 1 died. I test my water like every other day because I don't want to lose anything. Everything is alright salinity and all I'm about to quite maybe it's not for me what do I do??