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Title: Excellent biological media
Review: I have a 55 gallon heavily planted tank that uses no carbon in the filter, just these pellets, as carbon in the filter would take out the nutrients in the water that I worked so hard to get in there in the first place!I have been using them for about three years now and haven't had a single issue. I place one of these in the canister filter where the carbon would go, keeping one in the bag and the other out of the bag (there are two bags in each box). Once every three months, I dump out the pellets that weren't in the bag, open the bag with the pellets and dump them in there and add a fresh bag of pellets which ensures that my beneficial bacteria stay alive and healthy.I've never had an issue with water chemistry using this product. If you use biological filtration exclusively, I would recommend this product without hesitation.
