First fox farms states you should use big bloom in conjunction with tiger bloom. Does this mean to mix them together in a one gallon jug or be separate one gallon jugs but used together. Anyways, I mixed 2 tsp tiger bloom with big bloom 1 tbl per fox farms soil schedule. My question is I can't get a proper pH reading when I add the ph up it seems no matter how much ph up I add it still stays at 6.5ish. Anyone?