What scale are you talking about?
pH is the hydrogen or hydroxide concentration in your pool. pH is a logarithmic scale ranging from 0-14 and 7 being neutral.
0 it dies to pool water chemicals
It is the Celsius temperature scale
The temperature scale in which a reading of 0 degrees equals the freezing point of water is the Celsius scale. On the Celsius scale, water freezes at 0 degrees and boils at 100 degrees at standard atmospheric pressure.
see leslie's scale and stain remover
Centigrade degrees or the "Celsius" scale.
The Celsius scale.
Centigrade or Celsius Temperature Scale
The freezing point of water on the Celsius scale is 0 degrees Celsius.
Water freezes at 0 degrees Celsius on the Celsius scale.
Rust in your water is caused by iron in your water supply. You can get a water softner and use the softened water to fill your pool, or you can fill your pool with the rusty water and use a scale and metal out chemical that you could purchase at any local pool dealer. If you choose to purchase the scale and metal out I would recommend taking a sample of your water so that they can test to find out the level of iron in your water. They then could instruct you on how much of the product you should use to clear your water up.
Alkalinity in pool water helps to stabilize the pH levels, preventing rapid changes that can lead to corrosion, scale formation, and skin irritation. Maintaining proper alkalinity levels can improve water clarity and overall water quality in a pool.