All Blog Posts (629)

Orenda Technologies has recently unveiled a new start-up program that prevents the formation of plaster dust by adding calcium (calcium chloride) to low calcium tap water while filling brand-new plaster pools. We have received communications asking us if this calcium program is compatible with, or a viable alternative to the Bicarbonate Start-up Method that also prevents plaster dust.

The Orenda start-up program can, in certain situations, be an effective alternative to the Bicarb…

For pool builders, remodeling companies, and pool plasterers that want the best chance to obtain a quality and discoloration-free pool plaster finish (including white, color, and quartz aggregate pools), the link below is to an article in WaterShapes (a pool industry publication) that explains the preparations, workmanship, and practices to follow. 

Consider performing personal supervision on the entire process to ensure good results.…

At what temp is wet down of curing gunite not neccessary?

During my visits to the Pool Stores, talking to Pool Store Owners & Store Managers, it is easy to perceive their concern around Online Sites competition. In a social media world and with the accelerated growth of e-Business, it is a valid concern, but instead let’s focus on understanding how the pool…

To have crystal clear water is the ultimate desire of any swimming pool owner.

When your pool water becomes cloudy, not only does it looks less inviting but you could run the risk of exposing you and your family to an unwanted health hazard.

There are several causes for cloudy pool water. 

Let’s talk about your pool's exposure to the environment and how it can be cleaned continuously…

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,…

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…

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…

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…

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…

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…

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…

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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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?

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…

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…

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)…