It is okay, but.....
The only benefit of it is that it is indeed reef friendly, no corals have been damaged during the treatment ( I have a 50 litre tank). Apart from that - not effective against the parasites. It seemed to help initially, however after the 3-d day of treatment the whitespot and the marine velvet diseases came back, repeat treatment didn't have any effect whatsoever, both infected fish are dead by now. It is probably worth trying whilst the infection is not in its full power, however I am not an expert, and the experience of losing both fish is rather sad.
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