So what you are saying is you have your tang in 1.008sg? We need more info on your tank. How old is the system? How big is the tank? How long have you had the tang? Are you running carbon on your tank? The best treatment for tangs is to get rid of stress and try and boost immune system. I would feed the tang fresh algae sheets once a day dipped in garlic. Try and keep salinity at 1.025. You can also try and feed the tang a variety of algae to help with the hlle
. Also there is no study that shows using a ro
unit will reduce the affects of hlle
. It is believed that running carbon on a tank 24/7 and a combination of not getting enough variety of food along with stress will create hlle
. There is really no treatment for it but it can be stopped and reversed but there will always be a marking on the tang.