I soak in a glass 1 gal jar ( 1 - 1 mix ) and place an open airline into the bottom to keep the purogen suspended, takes an hour or two and its back to being white, I then rinse with fresh water 4 or 5 times and on the last two rinses add prime maybe 2 teaspoons. I then re rinse and put it straight back in the tank, so far the discus and cherry shrimp have had no problems.
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