Stronti+ provides all the strontium needed for optimum and healthy coral, clam and coralline algae growth.
Dose your tank every 15 days. One standard vial treats 30-250g; one Pro vial treats 250g to 500g. Prodibio doesn't spoil, and you can't overdose it.
Biodigest comes in two sizes: 30 standard vials, or 10 Pro vials.