Ok here's my deal. I have a 46 gallon bow tank with 2 clown fish (orange n black), watchman goby, 2 green clown gobies, 2 pajama cardinals, 2 blue n yellow damsels and an orchid dottyback. Also 2 peppermint shrimp, 1 starfish, crabs and snails polyps, an anemone, and a couple other coral with 50-60 lbs of live rock.
I am running a fluval fx5 canister filter which I clean monthly with bioballs and carbon. Also a protein skimmer.
Tank has been up and running for 3-4 months with live sand added as substrate. Orchid I got from a friend who had it for a while. All fish and corals are doing fine but I noticed today on top fin of dottyback a little chunk missing with white on both sides. The tail had a piece missing too but no white. Now it's not white dots but like a line running down where it looks torn. I've been keeping up with water changes and cleaning so any suggestions on what it could be? I'm hoping not ich.
Also I bought the 2 damsels and a 3 stripe damsel at same time but he was too aggressive so I took him out and put him in a 10 gallon on day 1. Shortly after 3 days) I put 3 stripe in 10g he came down with ich but he's alone. And he showed no signs of ich in 46 gallon for the 3 hours he was in there before I took him out due to his aggression.
Please any help would be great. I also would like to know if it's ich how to treat without removing dottyback from tank with corals and inverts. It would be a pain to do so removing things and all.
Thanks and I hope to get some solid advice