The tank's a 29G w/ 10G Sump: 1 Maroon clown, 2 Blue Damselfish, FOWLR
, started it October 2003.
Water parameters (Ammonia, Nitrite, Nitrate) are excellent, all at zero; nitrates at 15. The water is crystal clear as well.
Got back from a weekend trip...I can't find my cleaner shrimp, some hermits are out of their shells (dead), two or three mexican grazers have gone back into their shells (no movement, can't tell if they are dead or not).
I don't really understand what's happening. What other things do i have to be wary of? Phosophates, silicates, etc.?