Seachem Purigen Organic Filtration Resin; Available in 2 sizes – bold-custom-projects
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Amazon.com : Pet Faves Seachem Purigen Organic Ultimate Filtration Resin 100ml (3 Pack) - Aquarium Fish Tank Filter Media for Freshwater & Saltwater with 10ct pet wipes : Pet Supplies
Seachem Purigen 1 Liter Premium Synthetic Filter Resin Marine & Freshwater 1 L | eBay
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Seachem purigen taking ages? I put the purigen in the filter box on Saturday and I feel there isn't much of a difference at all in regard to tannin removal. How long