Bicarbonate in a 20g/L solution to about a 200g system volume tank. I started at 8mL/day and my nitrates went from 0 to 0.4 in about 1.5 weeks. I increased it to 10 mL/day recently. I’ll check next week and will increase it more. Perhaps my goal is 6-10 since my phos is around 0.06.
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