Background:
55G, 55lbs Live Rock, Sand Substrate, AC110 Converted Refugium, Skimmer, 32X Turnover, Inhabitants Include the GSP, a Flame Angel (being transfered) and a Dwarf Zebra Lionfish, all about 3.5". No new additions to the tank, and no aggression between anything. The puffer does not go near the lionfish's fins for those who are about to ask, he is really quite docile. Everything else seems healthy. The tank is fed once a day, a frozen mixture of squid, shrimp, clams, mussels, oysters, nori, selcon, and garlic.
Tank Parameters:
Temp 77
SG 1.025
pH 8.2
Ammonia 0
Nitrites 0
Nitrates 5
Ca 480
dkH 12
The Ca and dkH are on the slightly high scale but I just dosed today beforehand, and I don't think they are relevant to the puffers condition.
The spot doesn't appear to be raised, atleast not noticeably. His eyes/coloring look great.
Crappy pic:
