Power House BOTTOM F is a Japanese natural, mineral aquarium substrate composed of natural soil. It is rich in natural fulvic and humic acids and naturally occurring minerals. It supports, above all, the development of ornamental shrimps of the Caridina type and has a positive effect on the development of plants in the tank. Using proper water mineralization (RO water + mineralizer) helps to keep soft acidic water below pH 6, which is ideal for Taiwan Bee and Tiger shrimps