so use ph water or tap water
I think u are mistaken a little.
ph water means water that you have adjusted the ph of...... you can adjust the ph of tap water....do u mean filtered water? you never want to use filtered water. It doesnt have certain minerals that plants need.
Here's how to check and adjust the ph. (yes use tap water)
water a plant with plain tap water, and collect the water that runs out the bottom of the buckets through the holes. Then check the ph of
that "run-off" water. adjust the ph of
that water, not the ph of the tap water when it comes out of the focet. when you water or feed the plants, the ph will change from the time you water untill it comes out the bottom. that is why you want to check the ph of the water inside the soil, and not the sink.
hope that makes sence.