How To Make A Sand Filter How To Make

2013-8-12how to build a bio water filterput a cover over ithe easiest way to make this cover is with some small plastic cupsrill a number of holes in the sides of the cups, so that the water can get throughhen glue the cup upside-down over the fittingefore putting your gravel, sand and activated charcoal in the filter, it needs to be.

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