Well I dont know as much about wrasses, anthias, etc, but I have personally formalin dip 10+ angels and tangs(PBT/Achilles/BlueHippo) for 50-60mins each without issue. The formalin dips I perform is in addition to 3-4 weeks of .5ppm cupramine. Its just an extra precautionary step.
I'm just...
I forgot to mention, I give all new fish 2-3 prazi treatments too.
yeah after my cupramine treatment, i transfer the fish into a 4gal bucket w/4ml 37% formalin(+2 airstones) for an hour. then i transfer the fish into my DT. Sometimes into an acclimation box, sometimes directly in...
sweet video.
for your achilles, have you tried blood worms or mysis soaked in Selecon? my AT goes nuts over both.
QT-ing that many fish in one tank is tough. once you add copper, some fish might not feed and it will throw everything off.
Every new fish goes thru .4-.5ppm cupramine for 3-4 weeks. + 1-2 one hr formalin dip.
even fish from DD(true personifer+achilles) goes thru the same QT regimen.
i have an achilles, pbt, and blue tang without ich. arguably the top 3 ich magnets. also a few angels.