Eco Reef Base is a magic slow release product that delivers the right amount of nutrients to corals over an extended period of time approx: 3 months per dose.
This avoid those spikes often created with hand dosing at infrequent interfals.
100% Safe, no chemicals in product!

Usage:
Fill 500gr filter bag with the ERB and place in in the sump as long as the water can run over or through it. corals should show extended pollips and improved colour within a week.
Replace bag when sign it appears to be exhausted.