REEF PLUS is a supplement for reef wide spectrum that contains trace elements, vitamins and amino acids that have been shown to have a positive impact on the growth of corals and other reef creatures attractive. Reef Plus is designed to provide nutirentes reachable in natural waters of tropical reefs. It contains vitamin B12, vitamin C, thiamine, inositol, choline, iodine and other essential componntes. Reef Plus is free of nitrates and phosphates. 500ml Reef Plus treat 8.000L.