Things You'll Need
- Mesh bag, nylon
- Rubber band
- Handful of peat chips or crushed coral
Instructions
Fill the mesh bag with either the peat chips or the crushed coral. This depends on which direction you wish to go; if you want to lower the pH, use the peat chips, if you want to raise it, use the crushed coral.
Tie the bag shut with the rubber band.
Rinse the bag under a faucet with fresh water to remove any dust.
Place the bag within your filter's cartridge compartment so that water runs through it. The pH level of your aquarium water should slowly begin to alter according to whether you used peat chips or crushed coral.