For soil use - mix one ounce ( 2 tablespoons ) of Super Plant Tonic to one gallon of (chlorine free) water. The NPK value is 1.25-.4-.9 Pour into soil at the rate of one quart (mixed) to each gallon of soil in containers, and for in ground use - do not exceed one gallon per plant (weekly). Example: 4 gallons of soil in a container - requires one mixed gallon of Super Plant Tonic per week - or less. For soil this works out to 16 gallons of mix at regular strength or 32 gallons at half strength per bottle.

no i dont check the PH of BMO. I check the water i mix it in. I prefer doing the bubbler method. I make a mix of around four gallons then with my bubble wand or fish tank bubbler, i mix for at least 4 to 5 hours. then apply. But you can simply follow their website directions and have no problems.
http://stores.ebay.com/Blue-Mountain-Organics