Adding a large amount of calcium hardness increaser to a cold pool

[schwim123]

I need to add a large amount of calcium hardness increaser to my fiberglass pool because my manufacturer tells me that the chalking we’ve been experiencing is likely due to low calcium since the level is only 80. They recommend that I get it up to 250-300. The water temperature is only 70 degrees right now and is falling so I need to know the best way to add it to my pool so it will dissolve quickly. I know that calcium gets hot when added to water so I worry that the calcium could damage or stain the gelcoat if it clumps up on the bottom of the pool. If I need to dissolve it in a bucket of water first since the water is cold, I need to know how much to add each time so I don’t melt the bucket or burn myself when adding it. If I need to just broadcast it around the pool, I need to know how much to add each time so it will dissolve well and won’t clump on the bottom. I’d like to get all of the calcium into the pool at one time so I can close my pool soon, but I’d be willing to add it over several days if that would be the best way to add it.

 

[YippeeSkippy]

just toss it into the deep end and brush around *real* good. It dissolves pretty quickly there.

We do NOT recommend dissolving in bucket first.

Maddie

 

[Bperry]

I need to add a large amount of calcium hardness increaser to my fiberglass pool because my manufacturer tells me that the chalking we’ve been experiencing is likely due to low calcium since the level is only 80. They recommend that I get it up to 250-300. The water temperature is only 70 degrees right now and is falling so I need to know the best way to add it to my pool so it will dissolve quickly. I know that calcium gets hot when added to water so I worry that the calcium could damage or stain the gelcoat if it clumps up on the bottom of the pool. If I need to dissolve it in a bucket of water first since the water is cold, I need to know how much to add each time so I don’t melt the bucket or burn myself when adding it. If I need to just broadcast it around the pool, I need to know how much to add each time so it will dissolve well and won’t clump on the bottom. I’d like to get all of the calcium into the pool at one time so I can close my pool soon, but I’d be willing to add it over several days if that would be the best way to add it.

It doesn’t get that hot. Just sprinkle it in the deep end like mentioned above.

 

[mknauss]

Interesting. Another member says their fiberglass pool manufacturer says the chalking is from their CH being too high at 200 ppm.

1yr old fiberglass pool - white staining under waterline with balanced pool. calcium?

Hi all, We have a 1yr old 10,000 gallon SWG fiberglass pool. I am prettty anal with water chemistry, checking and balancing every other day or so using Taylor test kit, and going by the ranges and levels suggested here and in the pool math app. Chemistry has been stable. I drained my pool...

www.troublefreepool.com

I do not think either matter.