I am mainly concerned with a few of my millies doing poorly currently. I lost a few frags after my PH dropped around the 7.71 range.
At around 6.5 sps corals cannot lay down calcium, at that PH the crushed coral media melts in my reactor.

Some of my monties, polker star and rainbow monti are also doing poorly, portions dying off. Also lost my blue millies. No noticible problems on other sps except very very slow growth.