dont be afraid to flush, flushing is like cleaning, its no different than 2 days straight rain ...yeah?

and your correcting a little low optimum PH is 6.5 - 6.8 for soil
vinegar is not the best choice for correcting, its works yes, but why not add something benificial to the water instead of something the plants not interested in.

PH down (phosphoric acid based ph down) is the best to use as our plants use large quantities of phosphorus throughout its life cycles

for ph up one should use a potassium based ph corrector as again the plants use large quantities of potassium

making a slurry and testing the PH of it will work fine
Ganja Guerrilla Reviewed by Ganja Guerrilla on . ARRGH....can someone take a look. Pics too! Not quite a week ago I got some clones that were rooted in rockwool. 2 Sour Diesel and 2 MK Ultra. Also have an unknown very small clone, so 5 total. All plants have received same treatment so I will cover them all for comparison purposes. - CLones were all 3 to 4.75 inches tall, except for the unknown which is only 1 inch. - Planted in SuperSoil with 25% perilite, says on the bag the soil is sterile and contains NPK as 0.14-0.08-0.03 with a PH of 6-6.5 but no mention of trace minerals. - Rating: 5