OTO and CYA and TC, oh my! What's being measured?

[aquarium]

Yep,

I understand the problem now. With aquariums the similar problem is with a slow build-up of nitrate, the end product of the ammonia cycle, which is diluted by water changes. So my thought was to apply that technique, albeit on a much larger scale.

I'm hoping that by starting with low CYA to begin with, that the rate of increase CYA>increase Cl>increase CYA can be held down to a flatter curve. Then smaller water changes to control the CYA level. We're about to go into dry season, so watering the yard with pool water gets double use of the water. The downside then becomes the higher use of muratic acid for the new water makeup. (EDIT: We already have high ALK, calcium and pH in the tapwater.)

TW

[waterbear]

Yep,

I understand the problem now. With aquariums the similar problem is with a slow build-up of nitrate, the end product of the ammonia cycle, which is diluted by water changes. So my thought was to apply that technique, albeit on a much larger scale.

I'm hoping that by starting with low CYA to begin with, that the rate of increase CYA>increase Cl>increase CYA can be held down to a flatter curve. Then smaller water changes to control the CYA level. We're about to go into dry season, so watering the yard with pool water gets double use of the water. The downside then becomes the higher use of muratic acid for the new water makeup. (EDIT: We already have high ALK, calcium and pH in the tapwater.)

TW

If you have a sand filter the backwashing will help the dilution. If you are using a cartridge or non backwashing DE filter you will be doing partial water changes frequently and usually have to rebalance the pool a bit each time.
On a related note, If you close the pool for the winter sometimes anerobic bacteria will degrade the CYA in much the same way that anerobic denitrification can take place in an aquairium with a denitrating coil or filter or a plenum. The problem is that the denitrification does not seem to proceed all the way to N2 which gasses off but seems to stop and urea and ammonia compounds which create a HUGE chlorine demand when you open the pool.