You'll need to wash them well to remove as much sediment as possible, but these miracles work wonders for keeping bacteria alive in your tank . I took a garbage sponge from a 5 gallon aquarium and replaced it with a small ziplock bag and then filled the aquarium with bacteria. After a month of really unstable water things have settled down and we now only change the water twice a month. Stop reading and buy them now. You will not be disappointed.
Omega-3 caps, 1000 mg, 100 pcs, 1 pack, neutral
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