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…Continue
One would think that when mixing white cement with white limestone aggregate, the final pool plaster product would always be white. But that is not always the case.
Unfortunately, white pool plaster sometimes turns gray (or grey) either immediately or a few months after the pool is filled with water. So what causes that to happen?
The concrete/cement industry has documented that late hard troweling can cause a cement surface to darken, mottle, and spot. Also, adding a high…Continue
Added by Kim Skinner on December 9, 2013 at 4:34pm — No Comments
Both white pool plaster coupons below have been in water for one year. Sometimes the water was slightly aggressive (negative LSI), and sometimes the water was slightly scale forming (positive LSI).
The top coupon was formed with only one percent calcium chloride (CC) added to the mix, and was properly troweled. It remained a “uniform white” the entire time.
The bottom coupon had 3% calcium chloride (CC) added, was late hard troweled, and also received some wet (water)…Continue
Added by Kim Skinner on December 14, 2013 at 12:03pm — No Comments
Years ago, pool service techs learned that aggressive water etches quality plaster surfaces uniformly - that it does not pick and choose some areas of the surface to etch, while leaving other areas untouched.
The cement/concrete industry documented that improper workmanship practices can cause cement surfaces to mottle, darken, discolor, deteriorate, streak, and spot.
Yet, in the 1980’s, when pool plastering companies began seeing white spots in some of their recently plastered…Continue
When a new white quartz pool in San Diego developed numerous shrinkage cracks and very rough and sharp calcium nodules everywhere, the plasterer drained the pool and sanded it, charging the pool owner one thousand dollars for the work. The crystalline nodules began to form again soon afterwards, so the plasterer told the pool owner that a pool plastering expert and consultant would perform an inspection to determine the cause. The plaster inspector was also a long-time National Plasterers…Continue
I was just reading the latest article in Aqua titled "Fight For A "Cleaner" Sales Channel"
When Internet retailing began over two decades ago, traditional retailers with storefronts and parking lots and cash registers…Continue
I'm preparing today to chair APSP in November. You may already know we are deeply involved in strategic planning, searching for our CEO's successor in 18 months, and trying to become more relevant to the swimming pool / recreational water industry as a whole. I'd like your council. Please answer the following: What is your vision for a better future for the industry? (Rank order your reply 1-10 or as few or as many as you like)
I want to fix the APSP! Will you help?
My friend Steve Gorlin, is the APSP chairman elect and enters office soon. There is also the upcoming change of the APSP's CEO with the exit of Bill Weber in 18 months. These combined events create the best opportunity for real change in the APSP since the transition from the NSPI.
The APSP has done a LOT of good, and…Continue
On one hand, the National Plasterers Council (NPC) claims that alkaline (positive SI) water during start-up causes a blotchy and smooth gray discoloration you sometimes see in new white plaster pools,1 and that an acid treatment (zero alkalinity) for a week is necessary to lighten the discoloration.2 Yet, hundreds (maybe thousands) of new pools are filled with hard tap water every year and don’t turn gray.
On the other hand, the NPC also says that aggressive…Continue
Biofilm: The Hidden Accomplice…
The following article addresses a challenge we often face in this industry. A challenge with a solution..., and the solution will open doors to more business and success for all.
First, I hesitated to write this as I know there will be some, who don't know me and will think I "being negative" or "uncaring", but that is not so. It is because I care deeply about both the industry and all of us who represent it that I created the Pool Genius Network,…Continue
Ok... by now you have probably heard of Google+... If not it's time to get acquainted!
Google+ is a new social network, and in my opinion it is the first of the Social 3.0 networks to arise. It is WAY more powerful, more…Continue
I have been targeted by a lot of contests lately, and I have to tell you, I find it quite exciting. When I have a chance to win something...and it can really be just about anything...I all of a sudden have a strong and fervent desire to WIN!
I don't think I am alone. I may be one of the few who starts living my life according to the prize I am [not] guaranteed to win, but I think most people are fairly jazzed by the…Continue
Pool and Spa owners and maintenance people are concerned about the need to keep the pool
water safe and healthy at all times. Most know that…
Gray (or grey) mottling discoloration which occasionally occurs in plaster swimming pools may also occasionally occur on other cement flatwork, including things like driveways and sidewalks. According to the American Concrete Institute and the Portland Cement Association, adding calcium chloride and troweling concrete too late…Continue
Gray mottling discolorations occasionally occur in new white plaster swimming pools, and cause of this plaster defect is being incorrectly assigned.
Gray (also spelled “grey”) or darkened blotchy discoloration of…Continue