It's a 3 year old tank, I got it a month ago from someone else, moved it all and set it back up using the same water, made no changes other than lighting. I originally had a 150 watt 10k MH
pendant but it only lit 1/3 of the tank, so I upgraded 3 weeks ago to the nova extreme pro 6x39 t5's 10k and actinic, plus a marineland singlebright led
, white and blue. Water tests consistently in normal range except a couple elevated Trates last week but I've done 2 pwc
's since then and they're back to around 5.
Now that you mention flow, I bet that's it, the rock sits in the center of the tank, one PH points up at the rear the other points up at the center, so it might hit him on both directions. He settled yesterday on a corner and is hanging there now. I doubt he will stay, he can't really hunker down in anywhere...