How to lower PH level from 7.2???

i hate mg in pots its good for outdoor in the ground but not so good in pot so easy to burn pick up some fish amulsion if your on a budget its cheap and can be found almost anywhere you could also buy some marine cuisine fox farm makes i and is cheap like 10 bucks online just mix it in no need to feed nuets till about fower i know people who dont use nutes at all after that stuff lots of good stuff in it

flush out your medium with 6.0 ph balanced water....purchase ph down if necessary.

Lime or lemon juice also works, but I would recommend using a sterile ph down product.

Apple Cider Vinegar is the cheapest and works great with no ill affects to ph Down water or nute solution.
To go from 7.2 to 6.5 ish I would guestimate you need 1/4 teaspoon vinegar per gallon of solution.
It varies depending on what your water souce composition is.

FatMarty said:

Apple Cider Vinegar is the cheapest and works great with no ill affects to ph Down water or nute solution.
To go from 7.2 to 6.5 ish I would guestimate you need 1/4 teaspoon vinegar per gallon of solution.
It varies depending on what your water souce composition is.

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Yeah what he said, I have also used lemon juice, but it does not seem to have as long a lasting effect as the vinegar.