Calcium Build Up

by Sean

I have a calcium ring around my pool. I saw your video but I learn better when someone actually teaches me hands on.

I see you are based in Arizona do you know of any really reliably and affordable (between $80-$100) pool maintainers?

Thanks for the question Sean

I'm am far and away removed from Arizona. I did have a pool route in the Phoenix/Mesa/Tempe area but that was over 10 years ago and I now live in Florida. I've lost contact with everyone there. They either have sold their routes or moved away.

Removing a calcium ring is pretty straight forward, although it does take alot of effort. All you need is a pumice stone, muriatic acid, Gysar "F" Tile Brite, and tile brush similar to a scouring pad.

In a bucket mix about 1 1/2 cups of Gysar with 1/2 cup of acid. Allow to sit for 24 hours, dip the pad into the mixture, and scrub on the tiles. This will be very thick. Scrub the tiles with the pumice stone and keep the stone wet.

To lessen the effects of a hard water ring keep the pH around 7.2 - 7.4 and scrub the tiles with the Gysar mixture once per month.

Again, this is pretty simple but does take effort.

If you feel your situation is more complex than this, I do phone consultations for a donation of your choice. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have nothing to sell you so you know I'm not bias.

Pool Consultation

Hope this helps and have a great Summer.


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New Pool High Calcium?

by Pete Roberts
(Bonita Springs, FL)

Our pool was just resurfaced and the in pool water feature was also rebuilt. The pool contractor told us when he finished the work to maintain a calcium level of 800! he said this would prevent scale build up on the pool walls and on the new water feature. We are finding this very hard to do.

When we add sufficient Calcium to get to 800, it quickly "drops back" to around 250 - 300. Why the drop? More importantly, 800 seem way high! Also, where is this Calcium that we add going? Expensive. We've added large amounts of Calcium three times since the Refinishing and are confused - and half convinced the pool contractor (a nice guy, but very sure on this) is wrong.

Thanks for the question Pete

First I need to be sure that when you mean resurfaced does that mean new plaster? It makes a difference because with a new plaster job there's a particular start up procedure that needs to be followed. One is an acid start up while a newer procedure is bicarb. I just wanted to be sure he meant calcium hardness and not to do something with bicarb.

That being said, it is very unusual that anyone would need to keep the CH at 800ppm. That's a bit extreme. The plaster pools on my route were kept at 150 - 250ppm and they did just fine. A pool heater or chlorine cell for a salt pool would be shot within a matter months, or less, due to the calcifying of the fins and coils. The National Plasterers Council recommends that new plastered pools keep the CH in basically the same range.

You raise the CH using calcium chloride. Living in FL as also I do I will assume you already have hard water. As long as the CH stays within that range you should be fine. I'd like to know if there was anything in writing about this issue, or was it simply his word. Where did he get his information? As they references that you can call about this? Anyone else that had his services and did this particular procedure?

I would suspect a possible drop could be attributed to the calcium chloride hardness being absorbed back into the pool surface which is probably calcium carbonate.

I would definitely talk to him again and ask for something specific in writing and references of where he got his information along with other jobs he's done. This is not necessarily a trust issue more than to verify the veracity of his claims. Better safe than sorry.

I hope this has answered your question to your satisfaction.

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Calcium Hardness" category.

Check back to this post for updates or answers.

If you feel your situation is more complex and want immediate assistance (within 24 hrs) you can make a donation of your choice and I'll answer your questions by phone.

Have I helped you find a solution to your pool problems? Did this information help you? Please consider making a donation to help keep this site going. Thank you.

Have a great Summer.


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swimming pool care, basic pool care, above ground pool maintenance, inground, salt water

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