I deleted my reply to your update thing and put it here. it’s the same text.
I wouldn’t recommend. I almost killed some plants by using citric acid to pH my water. citric acid forms citrates and too much of those are not good for plants, it can mess with their metabolism.
so after my experience my suggestion is to stay with a proven product, pH adjusters aren’t expensive HOWEVER with a good soil fauna you might not see any problems with lemon juice or citric acid BUT with a good soil fauna you might not need to pH your water in the first place, that’s what Scotty is always talking about: using Recharge and the soil fauna will take care of the pH as long as your water isn’t extremely acidic or alkaline to start with