I Built my Own Biological Filter

Things you would need:

1. Basin
2. Pebbles
3. Activated Carbon
4. Cloth
5. Plastic Basin
6. Small mesh screen

First, put a hole at the bottom of the basin farthest from the source of water. Cover the hole with mesh screen to prevent the pebbles from coming out the basin hole. Put a layer of pebbles up to half the basin. Add a layer of activated carbon half of the remaining space, then cover with a cloth. The cloth will serve as the mechanical filter removing solids. The carbon will eliminate the odor and the pebbles will serve as the biological filter media. Nitrifying bacteria will thrive on the pebbles surface. Harmful ammonia will accumulate in the pond. Bacteria on the pebbles will break it down to nitrates and nitrites. This water is good for use on plants.


"This water is nice enough to drink"