Perhaps encountering first unexplained problem. 75g mixed reef, 2 months old. Pair of clowns in tank for past 5 weeks (tank was fully cycled before adding them). Not sure of a couple of things. Firstly, the white string on the small clown...poop or parasite? He looks thin and did not eat real well tonight. And secondly, something seems to be precipitating out in the tank, particles. Alk is 8.3 and calcium is 400. Ammonia 0, Nitrite 0, Nitrate 20ish. Any suggestions? Especially concerning the clown. Thanks.


