I haven't used bio bizz light but from what I know of it it's close to promix with little to no nutes. With the size of your plant and no nutes in your soil you can start @ 1ml/L, I start mine @ 1ml/L @ day 10 and feed .5L feed per plant. And I know it is very confusing it was to me too when using the 3 part system but the G/ m / b base nutrients are designed to use @ a 1/ 1 / 1 ratio from grow all the way through bloom you can see this on the advanced nutrient calculator provided on their website