All-in-1 raises alkalinity (Ca, Mg, Ba, Sr) in reef aquaria, corals, calcerious algae, tridacna, etc… secrete lime.
All-in-1 replaces everything that has been secreted from marine life, needed for their synthesis.
Calcium, magnesium, strontium & barium are mixed in an optimum proportion and the carbonate hardness / alkalinity is evenly raised.
300 ml for 900 L