sorry meant to lower my fixture by so many inches to increase my par. is it necessary to use flourish Phosphorus and flourish Potassium? and even flourish nitrogen, the seachem chart seems like alot of dosing.
Yes, P and K are your other two macronutrients that are required for healthy plants.
And the chart probably seems like a lot of dosing because the Seachem products are mostly water.
Dry fertilizers are the way to go, if you want to save money.