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All Blog Posts (625)

Cal Poly Plaster Study Conclusions Shown to be Incorrect

Beginning in 2004, a series of plaster research studies were released by the National Plasterers Council (NPC), which they instigated and financially supported, and which were undertaken by the California Polytechnic State University in San Louis Obispo. In these studies, the researchers concluded that aggressive water conditions were the cause of “spot etching” and other plaster surface defects. The conclusions, and the quality of the research, have long been contested within the industry,…

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Added by Kim Skinner on December 6, 2017 at 10:18am — No Comments

The Future for pH and Chlorine Standards

It appears that the pool industry’s long-time recommended parameters for chlorine and pH levels will be changing in the near future.

The current range of 1 to 4 ppm for chlorine will likely be raised when pool water contains cyanuric acid (CYA), and the pH range will be broadened beyond the current limited range of 7.2 to 7.8. The reason for this change is due to a new understanding of the science of stabilized pool water.

Some years ago, Richard Falk (known as Chemgeek on pool…

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Added by Kim Skinner on December 4, 2017 at 12:28pm — 2 Comments

Announcement of Pool Plaster Study

The research and consulting group onBalance has decided to conduct new plaster research studies to generate additional evidence regarding the cause of unsightly plaster discolorations and defects. The plaster issues of concern are gray mottling discoloration of white plaster, white spotting of both colored and white plaster, calcium nodules, spalling, flaking, and craze-cracking.

One aspect of the study will be to construct two demonstration pools, each with sections of various…

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Added by Kim Skinner on March 23, 2017 at 3:29pm — No Comments

Residential Water Quality Standard

After a few months of beating my head against the wall, I could not stand it anymore. So I wrote a letter to anyone that would listen. Not many did, but a big thanks to Service Industry News. Maybe we can get some answers, maybe not.

I want to understand why the APSP, an association that is supposed to be “dedicated to the growth and development of its members businesses,” would propose a residential pool water chemistry standard.

There are so many reasons that this is…

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Added by Ken Scott on November 30, 2016 at 6:10pm — 2 Comments

The Reality of Pool Chemical Treatment

For at least 40 years, many pool service companies have been successfully maintaining their residential pools on a once-a-week visitation basis. Empirical evidence has shown that pool water can be kept safe and properly sanitized without harmful bacteria and algae developing with weekly treatment programs.

Also, pool service companies provide a great service by keeping hazardous chemicals out of the hands of pool owners and their children.

One reason that pools can be kept…

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Added by Kim Skinner on November 29, 2016 at 1:34pm — 4 Comments

Register To Exhibit Today - Pool Spa Patio Expo



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Added by PGN Admin on September 15, 2016 at 9:40am — No Comments

What Alkalinity is Best for Pools?

It is amazing how incorrect information gets started, and gains traction despite being wrong, and not based on science. For example, contrary to some pool literature and manuals, it has been shown that a pH of 8.0 to 8.4 is workable, and sometimes is best for some pools.

Another misconception regarding pool water maintenance involves the recommended “Ideal” alkalinity range of 80 to 120 ppm. While that may be a good range for some pool situations, it is not necessarily the best when…

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Added by Kim Skinner on September 13, 2016 at 3:33pm — No Comments

Just starting out-any advice would be great

My husband and I are in our infancy of getting a pool cleaning business up and running. We live in Central Florida where I'd say 85-90 percent of the pools are screen enclosed. What is a decent mid range pool vacuum for us to use? We don't want to spend a ton of money til we see how we do. Also any advice or suggestions are welcomed. Thank you!

Added by Tamara Tamblyn on August 27, 2016 at 1:55pm — 2 Comments

What pH is Best for Pools?

Experienced service techs know that the pH in many of their pools generally rises above 7.8 within four to seven days following chemical treatments.  It is a chemistry reality that when water contains 80 ppm to 120 ppm of carbonate alkalinity, and is left alone and untreated by additional chemicals, the pH will rise to 8.0, and sometimes as high as 8.4 and stay there until chemically treated again. 

What does this mean?  It means that thousands upon thousands of residential pools are…

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Added by Kim Skinner on August 3, 2016 at 9:42am — 3 Comments

Curtis Seal Super Bond

My product has never had a  call back. We don't have the calcium nodules and we don't have the streaking in the plaster; We have done 2 pools with color plaster and the color is still in the plaster and this was done in 2010. We have pools that are 10 years (meaning the surface) and they have no stains. 

We don't always have to take the old plaster off, if it is in good shape we  can go right over the old plaster.  If it is peeling and blistering we can sand blast it or chip.I don't…

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Added by CURTIS ROBINSON on July 28, 2016 at 1:19pm — No Comments

14 Easy To Avoid Mistakes for Your Website SEO

Dear Pool Genius Network Member,

Join us for a powerful business building webinar!

14 Easy To Avoid Critical Mistakes for Your Website SEO 

Wednesday -  Jul 13, 2016 9:00 AM PDT - 12:00 Noon Eastern…



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Added by PGN Admin on July 12, 2016 at 9:31pm — No Comments

A Solid Requirement

Just got my latest SIN and was really surprised by the satement that APSP made about the latest ANSI Standard they are working on.

Why would they worry about a solid requirement for water quality when the one that they got approved for plastering was FAR from "solid"!

Whats the deal?

Added by Ken Scott on July 5, 2016 at 6:30pm — 1 Comment

tens of thousands of small, sharp dots all over pool.

New gunite pool as of July 2015.  Opened this season 2 weeks ago and found tens of thousands of small, sharp dots all over pool.  Perhaps calcium nodules, but so many.  Everywhere.  Cut knuckles on them.   Help? Plaster bonding massive…

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Added by Ethan on May 31, 2016 at 9:46am — 5 Comments

What is the NPC up to?

Some plasterers are occasionally finishing pools so fast that it detrimentally affects the quality and durability of plaster surfaces, and are not even aware of the consequences. And the NPC is enabling for this to happen. This needs to stop. Improper practices can speed up the finishing process, but they also lead to a short life-span for plaster, lasting only five-ten years instead of twenty. They are not doing the consuming public right by condoning, and by omission endorsing, those…

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Added by Kim Skinner on February 24, 2016 at 2:25pm — No Comments

Pool Service Techs: Don't Get Hoodwinked

Imagine, service techs: from day one, you maintain the pool water in perfect balance, yet get blamed for causing various plaster discolorations or defects. That is not a pleasant thing to deal with, especially if you are being told to pay thousands of dollars to re-plaster the pool.

Yes, some plastered pools (including quartz and pebble finishes) may develop either white spotting and streaking, calcium nodules, gray mottling discoloration, spalling (flaking), severe craze (check)…

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Added by Kim Skinner on October 26, 2015 at 1:38pm — 3 Comments

Our Mission Statement:

Ocean Blue Pools LLC is widely recognized for extravagant swimming pool construction and unmatched customer service. …

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Added by Randall Schmidt on September 22, 2015 at 9:52am — No Comments

Plaster Spotting Exposed Again

The swimming pool publication, Service Industry News and its’ PhD chemist, recently peer reviewed the NPC/Cal Poly (NPIRC) Phase 2 pool plaster study report and concluded that white spotting (soft spots, spot etching, and spot alteration) of their plaster pools was not caused by aggressive water, and that the claims (by the NPC) regarding that study are false. In fact, every plaster study of the past twenty-five years has exposed that the NPC is wrong, and that aggressive pool water does not…

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Added by Kim Skinner on September 18, 2015 at 6:00pm — No Comments

NPC & Color Plaster

If NPC leaders would just acknowledge what improper plastering practices do to pool plaster, there would not be a controversy within the industry - and there would be fewer plaster defects and discolorations occurring.

Case in point: Adding calcium chloride (hardening accelerator) to plaster and water troweling enables pools to be plastered faster and easier. But adding calcium chloride (CC) to a color pigmented plaster can also lead to blotchiness and mottling, which pigment…

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Added by Kim Skinner on September 3, 2015 at 10:30am — No Comments

Kudos to Service Industry News

Instead of writing a “he said, she said” article about the plaster spotting controversy, Service Industry News (SIN) thought it would better serve the pool industry by conducting their own investigation to determine what information is true, and false. They started on that goal by analyzing the Cal Poly test pool studies. In their July 31, 2015 issue, SIN presented credible evidence (from the Cal Poly Phase 2 report) that the white spotting of the plaster test pools was not caused by…

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Added by Kim Skinner on August 7, 2015 at 2:53pm — 2 Comments

Power Vac vs. the Hammerhead Vacuum

So I just got a Power Vac PV2100 and filmed it for my YouTube Channel. It is a pretty awesome product and will speed up my time out in the field tremendously.

It seems even in my area the Hammerhead is more popular and was wondering if it was just better marketing or better product that makes this appear so. So a little informal survey. Which do you use and which would you think about purchasing? And has anyone used both and can compare that way?

Here is my blog article on the…

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Added by David Van Brunt on June 21, 2015 at 8:05pm — 4 Comments

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Kim Skinner commented on Kim Skinner's blog post The Future for pH and Chlorine Standards
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