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that calcium reading was after it precipitated, not while still in solution in the tank, i was going to wait 24 hrs after the dosing to test the calcium so it had a good chance to equalize in the tank, but precipitated before i got the chance
i have a sump w/my crappy protein skimmer in it, but it is oversized so it does ok, lots of live rock/sand and plants to keep levels down
here is the normal operational setup:
t5 ho 156 total watts 50/50 blue and 10K, 9hr light cycle with blues coming on 1/2 hr before and going off 1/2 hr after the 10k's
small uv sterilizer use, occasional activated carbon use
43 gal display w/~70lbs live rock and 3-4" dsb (which has not been stirred) with about 4 gal in the sump
the tank has only been up for about 4 months so dsb is probably not causing the crash
oh yea, somehow my 2 clownfish are still alive (although very stressed/breathing hard), but my shrimp, snails, and a good number of bristle worms are dead. i thought the bristle worms were fairly indestructible
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