this is the first time I come across measuring pp via coloration. it's best to weigh it & mix it with water solutions. the right ppm is a must as high un-measured dosages will kill any damn thing easily.....not forgetting fishes.

pp oxidises organic materials...contents.......so most of the parasystic organisms will be dead. to kill all parasites in fishes.....you have to achieve at least pink coloration for a minimal time of 4 hours & do it for 2 days to be fully assured.

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Indo baret....Super Nice!