I was also curious regarding the Excess/Limiting nutrients...
I have done a lot of reading regarding ferts, lighting etc. I understand the concept of excess nutrients contributing to algae. I also understand the concept of lack of a nutrient means the plants quit using up the others, leaving them available for algae. What I was going to ask is..how do you know which it is? When I have algae start appearing, how do I know if I should cut back, or increase the dosae on the ferts?
As far as the "excess" goes, I know if 1 nutrient is lacking, the others are considered "excess" ( which actually falls under the nutrient lacking catagory) but as long there is exess of all the required ferts, is that not what the EI method is based on? Supplying enough required nutrients and then doing a w/c to reset once a week?