15K and I don't remember exactly how much because I added, ran pump 12 hours, tested and then repeated until I got around 30 ppm. If I had to guess I would say about 3 lbs. And yes, granular.
15K and I don't remember exactly how much because I added, ran pump 12 hours, tested and then repeated until I got around 30 ppm. If I had to guess I would say about 3 lbs. And yes, granular.
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