Have you already purchased the Ocean Forrest? If not, would you be open to considering different brands?
You have two ways to go about this. You can either amend the soil in advance and then just use plain water all the way to the finish line. Or, you can mix nutrient solutions from 6 different bottles (that smell like a skunks balloon knot) for the next 16 weeks. Your call..... but for the same $100 you're going to spend on bottles, you can pick up a few meals, some compost, aeration bits, and minerals and end up with a kick-ass soil that's maintenance free (no farting around with ph and the like)..... AND you can use it over and over again by just re-amending with those meals that you already have from the first round.
Say the word if you want more info.
FWIW I've used the general organics lineup. I got pretty good results, but nothing like I'm getting now with an amended soil