I've read here that pointing the returns upward toward the water surface will aerate the pool and help increase pH. My question has to do with how much movement on the surface of the water is sufficient to aerate the water? Does water actually have to 'break' the surface or will even subtle / soft ripples on the surface of the water cause enough aeration to affect pH levels?
Reason I ask is this...
Recently my pH has been holding quite steady around 7.5 and my TA around 90. I hadn't been testing my water for a few days as I waited for my replacement/refill reagents to arrive. During that time, my water level has dropped about an inch or so do to evaporation and as a result, the 'ripples' on the surface of the water became more pronounced due to the surface dropping closer to the returns. Today I tested my water and the pH shot up to 8.0 which surprised me a little b/c there hasn't been any unusual amount of rain or anything else that I thought would affect the pH levels so much in only a few days. Then I saw another thread just now recommending to aim the returns up to raise the pH and it got me thinking... if the water level lowering due to evaporation is what caused my pH to go up?
Reason I ask is this...
Recently my pH has been holding quite steady around 7.5 and my TA around 90. I hadn't been testing my water for a few days as I waited for my replacement/refill reagents to arrive. During that time, my water level has dropped about an inch or so do to evaporation and as a result, the 'ripples' on the surface of the water became more pronounced due to the surface dropping closer to the returns. Today I tested my water and the pH shot up to 8.0 which surprised me a little b/c there hasn't been any unusual amount of rain or anything else that I thought would affect the pH levels so much in only a few days. Then I saw another thread just now recommending to aim the returns up to raise the pH and it got me thinking... if the water level lowering due to evaporation is what caused my pH to go up?