they contain the micro and secondary trace elements,i would use it(bloom) on the next feedings,as far as a ph down,i use nitric or phosphorous acid,I've never used vineger,aquarium testers are fairly reliable, If i may make a suggestion,"pyrosol"from general hydroponics is an excellent additive,it contains most of the necessary micro &trace elements,and is a good soil conditioner,....bonbon http://www.altgarden.com/site/additi...s/pyrosol.html
bonbon Reviewed by bonbon on . Nitrogen, Potassium or Magnesium Deficiency, or salt lockup. My plants are between 12-14 inches tall I feed Botanicare Pure Blend Pro in soil 3-1.5-4. My plants were very dark green and had red strips on upper stems and red fan leaf stems, I guessed this was N deficiency so started feeding. The first feeding 1/2 oz per gallon resulted in a growth burst, they loved it. So the next feeding 3 days later at the next water I used 1 oz per gallon recommended for aggressive strength and growth with the same results, however the red stripes or red leaf stems Rating: 5