New plastering job should be finished tomorrow , tested water from the tap today and got the following readings:
TA : 80
Calcium Hardness : 50 ppm
Given the low calcium hardness , my CSI is going to be really out of wack. I've read conflicting advice on when to add calcium hardness after a replaster. Some say it's too strong to add at the start, the new plaster will naturally raise the calcium levels as it cures and to wait awhile until trying to adjust.
Others, seem to recommend adding slowly (max 10lbs at a time) , pre-mixed in water to the pool (morning and night) and raise to 150ppm as soon as possible. Even at 150ppm with 80 TA that's going to put my CSI too low (assuming stable PH , water temp and CYA) ?
I'm assuming the second opinion of adding slowly after the water is filled is the better option, should I push it to 250ppm asap to get my CSI in a good place?
Let me know of any other options to get the CSI in check fast - I don't want plaster problems.
TA : 80
Calcium Hardness : 50 ppm
Given the low calcium hardness , my CSI is going to be really out of wack. I've read conflicting advice on when to add calcium hardness after a replaster. Some say it's too strong to add at the start, the new plaster will naturally raise the calcium levels as it cures and to wait awhile until trying to adjust.
Others, seem to recommend adding slowly (max 10lbs at a time) , pre-mixed in water to the pool (morning and night) and raise to 150ppm as soon as possible. Even at 150ppm with 80 TA that's going to put my CSI too low (assuming stable PH , water temp and CYA) ?
I'm assuming the second opinion of adding slowly after the water is filled is the better option, should I push it to 250ppm asap to get my CSI in a good place?
Let me know of any other options to get the CSI in check fast - I don't want plaster problems.