Increases and maintains the pH level of 8.3 in all marine aquariums. It is specialized for marine aquariums with fish but can also be safely used in reef aquariums. Contains borate for increased stability. Contains magnesium to reduce precipitation. Marine Buffer will safely raise the pH level of seawater to 8.3. It will not raise the pH level above 8.3 even in the case of accidental overdosing. Marine Buffer contains sodium, magnesium, calcium, strontium, and potassium salts of carbonate, bicarbonate, chloride, sulfate, and borate. It is recommended to monitor the values using Seachem's multi-tests to check the pH level and total alkalinity. Marine Trace restores the proper concentration of trace elements. 250 g is sufficient for 4000 liters.