Trying to figure out what's going on here in the last week both my cleaner shrimp died, one went missing the day before I added the pair of long nose Hawks and they showed no interest in the one that was left in the few days I've had them in that tank, just found the other one dead in two pieces this morning. Gonna test again later today but numbers have all been testing good or good for this setup as nitrates and phos run a little high with my current stock. Only thing I could see that is off is my ph is ranging between 7.6 and 8.1 it looks like, only got the probe installed 2 days ago so don't have much data to work with, records from testing it prior to installing the probe were always between 7.8-8.1 for some reason ph always seems to be on the lower side, I was running the light over the fuge 24/7 but turned it off for 4-6hr a night when I slept to give the wrasse down there a little bit of a dark period thus the 7.6 ph readings. Both shrimp have disappeared at night which makes me wonder if there is something in there I don't know about. Any thoughts or advice would me much appreciated, also it's worth noting I have a pistol shrimp and a harlequin shrimp in there and both seem fine which makes me think it might be something other than the slightly low ph.