So for say around 800watts of CFL's would i use the recommended dose of FF nutes for hydro set-ups or would i use 25% less then recommended dose? I have heard both so please sort this out for me. My set-up is 5gallon DWC bucket with airstone.
There shouldn't be any reason why you wouldn't follow the recommend nutrient levels, based upon the wattage of your lights. Follow the feeding schedule like normal.