Fluval Shrimp Stratum Substrate supports a slightly acidic pH, ideal for most shrimp and plant species. It is similar to the Plant Stratum, however its smaller composition makes it ideal for shrimp to climb on. Shrimp Statum provides newborn shrimp with the ideal refuge, allowing them to escape predation until they are large enough. Its dark color also contrasts against the vibrant colors of many dwarf shrimp species, making them easier to view. Will not discolor water and helps to control organic discoloration typically present when natural driftwood is used.