idk, But we use 2 part ESV B-ionic. ALK and Cal. everynight before i Topp off the tank i Dump 20-22ML of ALK , and i Dose 25-30ML of CAL every Night before i go to bed. Total water is 100G SPS HEAVY, Mixed with ZOA heavy , some chalices and acans as well as bubble tips and rock anemones.