ISTA pH 6.5 Shrimp SoilFormulated for ornamental shrimps and sets aquarium pH level at 6. 5 for shrimp and plant species that require very soft acidic water. Give your aquarium plants the best possible conditions by providing the correct pH and water parameter for their growth and vigour. This purpose developed aqua soil has a granule size of 2 3mm which provides ideal rooting conditions for aquatic plants, while also allow water to flow through the substrate. It will also