Need help getting my pH down...

So my pH is way too high, but I'm not in a position to buy anything right now so adding any type of something I have to buy is out of the question. Any ways to lower pH with household items?
 
Yeah I did a lot of reading and I've found that apple cider vinegar is the best way...but I'm still not sure how much to use per gallon. Also somewhat related...my girls are in week 5 and I've started molasses feeding, should I stop using nutes? And is it ok to use molasses and vinegar in the same feeding? I know that might sound dumb but I'd like to fatten them up as much as possible and from wat I can tell this pH problem has been ongoing and has started to lock out P from my plant...so they need all the molasses they can get lol
 
I did 1 1/2 tsp for half a gallon and it dialed the pH down to 6.5 (read the meter a day later) so I'm thinking it was a perfect amount. I also tried feeding molasses and vinegar in the same night and my plants seemed to respond really well, though maybe it has more to do with the pH not being 7.5 anymore so the nutes aren't locked out from the molasses and other nutes that were just sitting in my soil. Overall if you're like me and cannot see spending money on a ph up/down regimen apple cider vinegar is a great way to go, gonna feed with it once a week until my girls are done (doing molasses every 3 days until harvest). I just don't get why people tell other people on the forums to mindlessly spend money on something you can get from an organic source...as well as something you can find in your house.

Also I might add I've been trying to find a more organic way to grow, though I'd never adhere to organic growing because of all the corporate BS that surrounds that word in the growing world...
 
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