I am having this horrible problem with my yellow tang, and I hope that I am not too late to get on here to seek for solution.
I got my yellow tang approximately a month ago, and for the first few days, I did realized some black ich on it. Without knowing much about these diseases back then, I thought it was normal and thus didn't do anything about it. The ich was gone shortly after but reappeared a week and a half ago. After doing some research and talked to the LFS
, I realized that the reason why they are "gone" is because they have matured. Having that said, I took the steps to do a few fresh water dipping, and the black ich was gone after the first dip, and never came back - yet.
I am not even sure whether this problem I have now is related to that black ich, but I just thought I would give that background info incase it helps.
My real problem, is the back fin of the yellow tang, is slowly getting eaten out - since approximately 2 weeks ago (before the 2nd breakout of the black ich). It started out in a hole in the middle (see pics), then started to eat outward, and inward after. It then started to eat towards the top. The LFS
told me that if it were bacteria that was eating it, the fish wouldn't even last for a few days to a week. Having that said, they did again suggested me to do fresh water dip, which shows no help after doing it for 3 days.
For the past few days, I started to see the "bones" on the top of the fin sticking out. Today, I saw some white substances on the "bones", not sure whether they are harmful, or it's healing/protecting it. The fish eats absolutely normal and very active. The other areas of the intacted fins are getting more "transparent".
Here are a few pictures to show how severe it is:
Started with the hole:
A week ago:
Just took this today:
The tank parameters are: Ammonia 0, Nitrite 0, ph ~8.2-8.4, Nitrate 30. The fishes feed on flakes only (I am thinking maybe nutrient problem?). His tank mates are just a pair of clowns. 20 Gallon tank, with approximately 20 lbs of LR
I am very desperate. I want to do whatever it takes to save him (if it's still not too late). Please share your experience and advices!
Thanks in advance!