Arisol.....I'm always happy to help out. I'll try to make this concise, this is a tried and true method I've been using for almost 30 years now.
One 3.8 cu. ft. Bale of Pro-mix, mixed well with 3.75 cups of dolomite lime and loads (done by sight) of perlite. I usually can get around 12-13 pots filled, 4 gallon size.
I use reverse osmosis water, ALWAYS ph to 6.3 to 6.5, never lower or higher taken after fertilizer is mixed in. Because the r.o. device strips out the cal/mag, I use around 8ml-10ml per gallon with all waterings.
Pro-mix is now making a mix with mycro's already in it, that's what I use. I use Z7 by Flying Skull as my enzyme- it's cheap.
My ppm starts at around 200 when they just sprout, and slowly move upwards depending on how they look in the grow. and where I'm at in the grow. In 4 gallon pots, I hand water every other day. Sometimes it's every 3rd day, just depends on how hot the room gets. I try not to let the temps get above 80 degrees, at night it drops around 10 degrees or so.
Are you growing in straight peat or using a "peat" mix?
Promix sells both- straight peat can be very acidic and tough to grow in. Message me instead of posting further in the forum, so we don't clog up the grow. Thanks. I have many documented grows on RIU, some in great detail. Here are some of the latest ones, but if you search you can find some from way back. In some of them, I really make an effort to provide the grow in detail, which may also be helpful to you. I'll be happy to answer any and all your questions
http://www.invalid.com/t/expert-seeds-sweet-zombie.934653/
http://www.invalid.com/t/battle-royale-dnas-kosher-kush-vs-imperial-genetics-kurple-fantasy.931703/
http://www.invalid.com/t/sweet-seeds-jack47-fv-jack-herer-x-ak-47.915137/
http://www.invalid.com/t/dnas-lemon-og-kush-grow.905289/