Today, I noticed that the largest of the 3, Kermit, has some black spots on his belly. Now, I'm quite familiar with black belly, having had them in a tank that was too small for a while (yes, I'm ashamed
There are 2 spots on his left flank, on the white portion of his belly, that weren't there yesterday. They do not have the 'vague' apperance of the stress induced colour change, bit are more like the spots on the top of his body. He is not exhibiting and strange behaviour, and chowed down his dinner with his usual relish.
In case it helps, here's my setup specs:
290l (75US gallons),
skimmer,
fuge with chaeto,
diy fluidised sandbed filter (equivalent volume to tmc1500 model),
Fluidised RowaPhos reactor,
Purigen,
Plenty of LR.
Stats:
Ammonia - 0
Nitrite - 0
Nitrate - 15ppm
Phosphate - 0
Alk - 8,
Salinity - 1.024 (with refractometer)
pH - 8.2
Tank mates:
3 x GSP's (yes they're quite big, and yes, they all get on!)
3 x blue damsels,
Xenia,
Lobophytum,
an unknown SPS,
Zoas.
If there's any more info that would help, I will have a go!