Hello Everyone!
Unfortunately I've noticed some worrying signs with my Plectranthias. His colour is still bright and well defined and his stomach has definitely started to fill out a little (rotating omega brine, spirulina brine and mysis every other day-eating like a champ) but yesterday I noticed a small black mark at the base of his dorsal fin and also noted that it was only on one side. I rechecked all the images of the species on google and wasn't able to find a photo of any that had such a mark there. When I got home tonight I noticed that it appeared to have become slightly larger and the fish was in a good position so I grabbed some pics with my phone. I'm a little worried this may be black ich because when I did the freshwater dip I noticed some small black specs in the bottom of the container but figured they were from the piece of black stone I used to weigh down the air diffuser and didn't think much of it.
Also since last observing him I noticed a single white spot on his tail and possibly one on his dorsal fin (you can only see the spot on the tail in the photos). I'm unsure if it was just the way he was moving his tail but the spot appeared to be moving around a little. I plan on checking on him before I go to work tomorrow to see if the white dot is still there or if it was possibly just some debris of some sort. both the black spot and white spot appear to be slightly raised (the former slightly more than the latter). I've attached a photo and circled the spots with blue, upon looking at the photo its possible the white spot may just be dust on the tank glass since there is an almost identical spot right beside the white one that isn't on the fish, this could also explain how the spot appeared to be moving). I'll clean the glass tomorrow and probably (assuming the fish cooperates) get my macro lens and try to get some actual photos once I get back from work.
Do you guys think I should do another 5 minute fresh water dip (with a different coloured stone)?
Thanks in Advance!