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Dosing
The maker doses this by schedule rather than by a fixed potency, so the calculator cannot use it. Follow the directions below.
How it’s used
1 scoop (~1/2 teaspoon) per 200 L every 4 days, pre-mixed with tank water. Start at 25% and raise 25% per month; use 50% in tanks over 2 years old or with PO4 above 0.15 mg/L.
Sources
Borderline: marine biopolymer coral feed / nutrient regulator marketed to lower phosphate; no potency. Zeo-Light HTU states 1 scoop = 1/2 teaspoon per 100 L (conflicts with shop's per 200 L).