Title: Don't Need to Rinse!
Product review: Added the 20lb Bag to 50% of the existing water in a 20 gallon tank (fish and most of the old substrate were removed first) and expected that it would be about 12 hours before it settled enough to add fish again, but after 1 hour it all settled and the water was clear again! Even with new, thoroughly rinsed, regular polished-pebble gravel I've had clouding of the water for a day or so. Just dump in on there right from the bag. 4 stars just for that, glad I didn't go with pool sand as recommended for a planted tank.
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