#356

Take a look at how to build the easiest and cheapest biological filter using a 2 liter bottle and 1 liter of K1 Kaldness Micro. This stuff is the best filter media money can buy, it lasts forever, and never needs to be cleaned. Magical stuff!

K1 Micro has 950 square meters of surface area per cubic meter which is almost double that of K1.

Music attributed to Kevin MacLeod under creative commons.

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