Collected from the mineral-rich foothills of Mount Aso Volcano in Japan, Fluval Stratum makes an ideal substrate for planted aquariums and for those keeping ...
The goal of the self-sustainable aquarium is to keep the nitrate level low. You dont want to have so much fish that the plants cant keep up with the amount of nitrates. Start with a few fish and see how well the aquarium holds up by using a test kit to test water parameters.
Best Plants for a Sustainable Aquarium. The plants you include must be compatible with the fish you put in your tank. Before you decide, make sure the plants you want wont be harmful to your aquatic life.

Understanding Water Quality in Small Aquariums. Clear 5 gallon aquarium with healthy plants and fish showing excellent water quality.
Substrate For Planted Aquarium.The fish provide nutrients for the plants, and the plants naturally filter the water, creating a sustainable cycle. With this eco-friendly setup, you'll enjoy fresh sprouts and a cleaner homewhile benefiting from the calming presence of fish!

Peat: This substrate greatly lowers the pH of the aquarium, so the fish that live in it should live well in acidic water. Its a very good substrate for plants, but it releases a lot of nitrogen -toxic to fish- and makes the water very dirty.