@Humblefish ;
@4FordFamily
Thank you for this great thread. I am currently treating my QT with copper. The residents include a 5" goldflake angel, a 3" regal angel, a 2" scribbled angel, and a velvet fairy wrasse. I use Seachem cupramine and the tank is a 40G breeder with a 20 long sump and a reef octopus 150 space saver skimmer.
I first noticed fine dust on the black tail and dorsal fin of the goldflake and since I have encountered marine velvet in the past, I didn't wait a second. I first dipped the goldflake in formalin solution for 30 minutes, then in methylene blue for 45 minutes, then fresh water for 5 minutes. I then put the fish back into the QT and dosed 20 drops of cupramine and after an hour I tested the water with Hanna H702 and got a reading of 0.22 ppm. The weird thing is I did not notice any rapid breathing or scratching. All fish have been in the QT for four days now and besides the regal everyone else seems to be eating just fine. The regal is a finicky eater anyway and even him picks at the oyster I put in the tank from time to time.
My question is: based on my research a range of 0.5 -0.6 ppm is required to eradicate velvet. Is this correct? I have another two juvenile regale angels (approximately 1.5") incoming and will arrive tomorrow. Can I add these two small regal angels into the QT and raise the copper level to 0.4 ppm? Or should I wait for a day before raise the level?