My tangs have recently come down with what I believe to be ich. Their body's are covered in small white spots, but I see no other tell tale signs of ich. No cloudy eyes, listlessness, rapid gill movement, scratching, change in feeding, or any change in behavior. In the four years I have been keeping SW i have never had a fish come down with ich so I am still kind of uneducated when it comes to its treatment. I know the basic QT routines, but setting up a QT tank is not really an option right now.
Currently, the only thing I am doing is soaking my frozen food in garlic, and monitoring for any further changes. It seems to be only affecting my two tangs. All other fish seem unbothered so far. I do 15 G water changes bi-weekly. I only use RO/DI water with a TDS reading of 0. I do not believe my tank is overstocked. I currently run a 100G setup with one purple tang, one regal tang, one ocellaris clown, one lyretail anthia, one orchid dottyback, and one six line wrasse. My skimmer is a SWC Xtreme Mini Cone.
The only thing I changed before the outbreak began was I started running Vertex bio-pellets in a TLF 550 reactor. I don't think this has anything to do with it, but it does seem strange this happened right after I added this to the system.
My water parameters are:
NO3 - 0
NO2 - 0
NH3 - 0
CA - 430
KH - 11
SG - 35 ppm
Anyone have any suggestions or things I should try? Thanks