So you see you are doing the tests right! You have good water as far as ph and TA. We can work on it once you dump that toxic soup the pool store made for you
Iron-VERY interesting about the first water out of the hose. Do something for me. Go to another hose bib and see what THAT water looks like when it first comes out. That one seemed fine
How well do you know your neighbors? Can you ask to see THEIR bib water? Not a problem I will check tomorrow
What does the inside of the tank part of your toilet look like? Is it discolored? My toilet has some iron colored stains on the bottom around the guts, but not terrible. The other bathroom I can’t really tell because quite honestly there’s a good bit of mildew in it. It’s a spare bathroom that no one ever uses or flushes so the water is kind of stagnant. Note to self go pour some bleach in that toilet tank
Do you know which of your hose bibs get the water from the city line first? I have some ideas. I do not. I would imagine it comes to the front of the house first, but then again my kitchen is on the front of the house and it takes forever for hot water to come through. However both of my hose faucets are about the same distance from the front of the house just ones on the left of the house and ones on the right of the house.