I lost most of my tank when I was overdosing my Alk. It got above 8 and the SPS started to get burnt tips due to my bio pellet reactor, then it approached 10-11 and the LPS receeded and the SPS all died. Then I started to lose head after head of LPS. I really watch my Alk now.
Something else may have sent your Alk through the roof, but your Alk swing probably had a big impact in the death of your corals.
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So many ideas, so little money!
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