Sweet Coralline™ is designed to provide major, minor & trace elements required to help grow coralline algae. Sweet Coralline™ also helps to raise pH and stabilise alkalinity. A tip to enhance coralline algae growth is to turn off your return & circulating pumps, then use a clean toothbrush to gently brush some of the coralline algae. Once it settles you can turn on your pumps and in time, the small fragments will grow.