reefocd

I recently found my alkalinity went to 6.1 dkh. I dosed within a few hours to bring to 7.1 in a 24 period. Will dose again to bring to 8.0 ish... So, I was cleaning the tank this morning and was saddened to see my Sally Light Foot Crab "belly up" on the bottom I know invertebrates are often sensitive to ph and alk swings.... Here are a few pics that I took, morbid curiosity.



But, as always in ...

Am slowing learning what this animal needs to be happy.... For example,

Enough flow to support itself. In good flow now, as in low flow it seems to sag as if to heavy.

I've had it for few years and quite slow growing? Not sure why?

My question, note the right edge in the pic, it continues day after day to not quite extend tentacles/polyp thingy's. What is it saying?