White Spot? I Think?

[mykgillespie]

Can anyone give me some advise with this?
I've had a Longnose Butterfly in quarantine for about three weeks now and about one week in he developed what appears to be white spot. He looks lightly salted! After noticing the spots I dropped the S.G. down to 1.013 and treated with Clout and RxP. I figured that the combination of the 3 would surely wipe out any parasites. After a week of treatment the spots seemed to be untouched. A yellow tang and a raccoon butterfly have been added to the QT in this third week about 5 days ago (Had no choice but to add them, no room elswhere.) and so far no sign of the same spots. I have not witnessed any flashing from any of the fish, and all, including the longnose, are eating extremely well and show no signs of stress. I can't figure out what the deal is with this longnose because there is definitely something there especially evident in the caudal fin. Other than the spots though this is pretty much the healthiest longnose I've ever seen attacks food, attacks my hand to get it, fins erect, calm breathing, never hides, vibrant colour, and white spots! Anyway, if anyone can recommend something else that I can do to get rid of these spots as they may not seem to be having an affect in QT, but I'm sure this would be a relentless parasite in a display aquarium and would like to eradicate this finally. Thank you in advance for any help.
Myk.

 

[beth]

What you have done so far, really is not effective with ich.
Hyposalinity needs to be preformed, and here is the procedure:
O.S.T. stands for Osmotic Shock Therapy which is commonly referred to in the hobby as hyposalinity [water that is deficient in sea salt]. Essentially, O.S.T. simply places the infectors [Cryptocaryon parasite---ick/ich] in an environment in which they cannot survive while the host, (or infected fish) can. This remedy WILL NOT work in reef systems, invert tanks or FOWLR as it incorporates lowering the specific gravity of the entire system to 1.009 Specific Gravity which is not tolerated by inverts or LR.
To drop the salinity, this is done as you would do a normal water change. However, you are simply replenishing your tank with fresh RO/DI water---not salt water! Monitor the lowering closely so as to not reduce it too fast. Usually over a period of 48 hours is fine. The bacteria colony which is the biological support for your tank will survive, the fish will be perfectly fine, but the ich will not. By lowering the salinity, you will also be lowering the osmotic pressure of the water. Boney fish tolerate this treatment very well, in fact, once the water become hyposaline, you will likely note a significant improvement in your fish health and appetite. There is no reason to fear this treatment. You can do a water-change out, in small increments every half hr or so.
Your goal is to drop the specific gravity to 1.009 [48-hrs] gradually. Once all signs of the parasite are gone, then keep your fish in this hypo-saline water for 3-4 wks. If all is well, then you can gradually [over the course of 4-5 days] bring the specific gravity [salinity] back up to normal levels . If all is well after a week, then return the fish to their main tank.
When the fish are eating, offer them quality and varied food soaked in garlic, zoe/zoecon, vitamin C.