Plants naturally turn water acidic - acidic water suits their processes better.
A slower but safer (for fish) way to raise the pH is to add oyster shells or clam shells (any hard shell). The pH will gradually rise to neutral levels.
If you want to lower pH levels, use peat that has been rinsed a little (rinsing reduces the amount of colouration it will do to your tank). Place a small amount into a fine-mesh cloth bag and suspend it in the tank. Or if your filter allows room for adding various materials, place the bag in there.
A slower but safer (for fish) way to raise the pH is to add oyster shells or clam shells (any hard shell). The pH will gradually rise to neutral levels.
If you want to lower pH levels, use peat that has been rinsed a little (rinsing reduces the amount of colouration it will do to your tank). Place a small amount into a fine-mesh cloth bag and suspend it in the tank. Or if your filter allows room for adding various materials, place the bag in there.
