Feeding really depends on the strain, use the ff feeding schedule at 1/4 strength and see how they respond, honestly you'll have to fuck with it until you find the sweet spot for your stain. Ohana does not have dolomite but Koolau Farmers should have it. If you add dolomite at 1 cup per cubic foot of soil, ph'ing your water really wont matter too much, that is one the beautiful parts of using a buffered soil, you could water with battery acid and your soil will always be in the 6.8~7.0 range. You could water with 6.3 and simply the let soil balance out the P.h. naturally.....i have a ph pen that i rarely use....those little jewels are for hydro guys.