Wow must have been a terrible experience. So Fishdog i have fungus guard on hand. I have enough to do 2 doses and can get more if need be. Says to add a second dose after 4 days. Would you suggest to use this product and do only the 2 doses?Sorry to here once their disk starts to go they deteriorate fast. The kind of bacteria that eats their flesh is nasty and fast. So yes treat the whole tank. Just follow directions and run it for the recommended time. It can hang out in your system and any stress on a ray will cause an outbreak. My melt down started with a frt that bit some rays. That stress and open wounds caused a melt down worth writing a book over.
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