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Just recreational here, kind of a hobby, but I do want good quality flowers.

Ok thanks fairly new to this and I don't want to screw up this next grow

So if you've never tested it how do you know it isn't around 7 PH? Your tap water may be totally different than mine, different nutrients added, more chlorine, or sodium.

So your tap water could be lower than mine, is it well water or treated water?

coco/perlite

I have no powdery mildew, never mentioned any problems with powdery mildew, My tent is fine, I'm worried that I will burn my new plants or lock out the nutes if the PH is too high, that's all. I think a 4x4 tent with 500w (actual watts, not equivalent)of full spectrum lighting, 50% humidity, and...

Well my tap water has a PH of 8.4 so I think I need to. The water here is extremely alkaline.

will this water hurt my plants? I ph'ed it with white vinegar to 6.2, PPM meter reads 426 after adding vinegar.

This is based on the amount of nutrients in 3.5 OZ of apple cider vinegar, which equals 7 tablespoons. I divided the amount of each nutrient by 7 to find out how much would be in 1 tablespoon. I was just curious as to how apple cider vinegar would work and would it be better, than white...

so I should try an extra teaspoon?

From what I have experimented with it drops 1 point per tablespoon of vinegar in one gallon. I am using PH strips to test the water, I let them sit out overnight chlorine was gone PH was over 8 I tried one tablespoon, shook it up then measured with PH strip, and it dropped to the middle around...

Would apple cider vinegar be better, it has some nutrients in it. I calculated how much per tblspn. 1 mg of calcium, .021mg iron, .7 mg of magnesium, 1.14 mg of phosphorous, 10.4 mg of potassium, and .7 mg of sodium, it takes 2 tablespoons to get from 8.4 to 6.2-6.4.

Tap water PH is 8.4 trying to get to 6.2-6.5, 30ml of white vinegar does the trick but haven't used it until I get some more advice

If I need it to right now it's on fan, in the south today it may be 40 and tomorrow it may be 80, when the temps in my tent get up close to 90 I run the a/c.

If I use white vinegar to lower the PH in my tap water will it hurt my plants? And will apple cider vinegar be better than white vinegar? I am using coco/perlite medium.

I have a portable a/c hooked to my tent and it has a dehumidifier option but haven't had to use it

add a fan and increase your airflow

I have issues with low humidity in my grow tent and I live in the south. It's 87% humidity outside but only 51 in my tent, I try to get it up during veg but it drops right back down, it holds at around 45-55% at all times, the highest I've ever had it is around 60%. Unless my hygrometer is wrong.

Are these close, I think they are near finishing just wanted some advice.