sick flame angel

[Yondiew]

Ok so I am new at keeping a salt water tank. I'm starting off small until I get experienced. I currently have a 30 gallon for display & a 10 gallon for QT. I bought a flame angel from a store the same day it arrived about 3 weeks ago & he is in the QT tank still because he keeps getting on thing after another. First he had popeye I treated that with marcaryn 2 then he got ich. Treated that with super ich cure by api. He seemed to be doing well for 1 day then when I woke up this morning he has tail rot? I don't know what to do? I do water changes frequent & clean subtrate too. Please help!!!

[leebca]

You have to stop and accurately take assessment of many different factors. There is no way I can trouble shoot the situation for you with the information you've provided.

Obviously the fish is under stress. Bacteria seems to be the underlying problem. The products you use may or may not be adequately addressing the bacteria, but the bottom line is, you need to find the stressors that are generating this and reduce or eliminate them.

If you still want help in this, then you'll need to answer EACH and EVERY question below IN DETAIL. If you can do that diligently and accurately, we may be able to help, or we will know something we have to ask more information about:

How old is your tank? When did it originally cycle?
What is the size (dimensions and gallonage) of your aquarium? Does the gallonage include the volume from the sump and any refugium?
List the equipment you have on your QT: Do you use mechanical, carbon or other chemical filtration? List all along with their maintenance.
What's inside the QT? List all things that are inside.
Foods you use and feeding schedules.
How did you acclimate it – what procedure?
Do you use any vitamins? Fat additives? Any elemental or other additives? Please list all.
Chemistries – Do you test for Phosphate, alkalinity, calcium and magnesium? Please give actual current numbers for everything. I would like test kit test results for ammonia, nitrite, nitrate, not dip stick results and actual numbers even if you think all is fine/okay. Have these numbers been changing lately?
Water parameters – please give actual numbers (pH and your pH range, salinity or sp. gr. & range, temperature range)
I want to know what maintenance you do on your QT. List everything including: Water changes (how much and how often).
What is your source water? (Tap water, RO water, DI water, RO/DI, distilled, etc.)