When was the last fish added to the tank ? Did you Quarantine any of your fish ? I couldn't find any info on Myxicin I hope it's not a copper based medication. IMO you should NEVER add medications to the display tank because especially if it's a reef inverts are very sensitive to these type of medications.
From the sounds of it you have possibly introduced Amyloodiniosis or "Marine Velvet" which is very deadly:
Quote:
The signs of amyloodiniosis include respiratory difficulties, loss of appetite, swimming near the surface, scratching. As the gills are usually the primary site of infection, difficulty in breathing is the most common sign and may be the only sign before death. Heavy infections may also affect the skin, fins and eyes. The common name "marine velvet" comes from heavy infestations of the skin which may have a dusty appearance...
Treatment for of amyloodiniosis
Chemotherapy is the only effective treatment for Amyloodinium, with copper being the most widely used. Copper will not affect trophonts or tomonts but is toxic to the dinospores (Noga and Levy, 1995). Free copper should be kept at 0.12-0.15 mg/L for at least 14 days, although 21 days is better to be certain of killing all dinospores and to ensure that all trophonts have become tomonts and all tomonts have excysted. Copper cannot be used in the presence of invertebrates and treatment should be performed in a hospital tank void of any calcium carbonate substrate. The copper level needs to be tested regularly to ensure that sufficient concentrations are maintained. Copper is also toxic to the fish and care must be taken to avoid overdose.
Of all the copper medications available on the market, Cupramine by Seachem appears to be the safest. It is a complexed copper and is more stable that copper sulfate, copper citrate or chelated copper. As it is complexed, the total copper concentration should be maintained at 0.5 mg/L for three weeks.
Noga and Levy (1995) report on success with the use of chloroquine diphosphate (an antimalarial medicine). It was found to be very safe and effective in killing dinospores on excystment. It is non-toxic to fish, but very toxic to algae and many invertebrates, so, like copper, should only be used in an hospital tank. Treatment involves maintaining chloroquine diphosphate at 5-10 mg/L for 10 days.
|
http://www.petsforum.com/personal/tr...loodinium.html