| | Re: API Leaf Zone
Most people comment that the EI dosing method is flexible. For instance if you miss your water change one week then do not dose the next week, or dose less. This gives the plants time to use up the nutrients in the water column.
Likewise you will see recommendations to start off dosing on the low side of the EI range. Give this some time to see how your plants react. You will notice on the sticky posts regarding EI it is geared toward higher light, CO2 supplemented tanks. However, if your running lower light or no CO2 supplementation then you can lower the amount you dose via the EI system.
Along those lines you should match the EI dosing to your particular lighting, CO2 supply, and plant mass. IE high light and supplemented CO2 means more plant growth which will require more nutrients to sustain the growth. Where as a lower light tank with no CO2 supplement and slower growing plants would not require as much supplemental nutrient dosing.
So what are the details on your current setup, light, substrate, CO2, plant species and how heavy did you plant?
I have a medium light tank with root tabs that contain macros and micros. Currently I am using Excel for a carbon source. The plants do not seem to require any additional nitrogen or phosphorous, but does need a little potassium. There was a bottle of API leaf zone that came with the used tank I bought so I use this to supplement the potassium. So far so good, and I keep a close eye on my plants to see how they are doing.