But what if NO3 and PO4 are already testing negligible to zero? I have the same problem. I tried running zeo to get rid of NO3 and PO4 .. didn't help. I run NO3 destroyer. NO3 is zero. It doesn't help. Acros drop dead after a few weeks. No obvious parasites. I wonder at times if it could be some kind of bacterial problem that once it gains a foothold there's just nothing you can do to eradicate it, because it's odd to me that out of 3 distinct reef tanks that I run, the same results happen in each of them. I used to be able to keep SPS - I can't anymore. Everytime I buy "test frags" or "test colonies" I get reminded within a few weeks that I am just wasting my money.
FWIW here are my numbers of the last tank I am trying SPS in. Ca 420, Alk 8, NO3 2.0, PO4 0.0, Mg 1390, SG 1.025. Source water is RO/DI. Water turnover is roughly 50x.
SPS can be one of the most frustrating and futile endeavours once it gets to the point.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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