Understand but you stated that you agreed with previous post - spot on - which though he had velvet. Then thread develops where he might have velvet and flukes or the latter. That is why I suggested Rally because it treats velvet and flukes.I don't like people to rely on Ruby Reef at display tank dosing levels to control flukes, I don't think it is strong enough. Perhaps as a dip, but then, FW works just as well. Praziquantel/Prazipro is a better choice and just as, if not safer.