Join Date: Apr 2004
Location: Laguna Beach, CA
I think the problem is that these Flourish products aren't very concentrated. For instance, the Nitrogen label says that 2.5 mL of product in 40 gallons raises nitrogen by the same degree that 1 mg/L nitrate would.
The Potassium says to add 5 mL of product raises potassium by 2 mg/L. Even with ~23 gallons of water in my 26-G, that's a lot of product!
Essentially the directions seem to suggest dosing in levels much lower than what serious setups (light, Co2) require.