Instructions followed exactly. The ratio of drops of 1 gallon of water to 30 that was in the tub kept the small head water moving in the tub for less than 2 minutes before it began to melt. 10 mins. I would give 0 stars if possible, just lost a $750 coral because of this rubbish. and yes the coral is gone, the photo was in fresh sea water right after the dive before taking it to an area of low light and low current to try and save at least 1 head.
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