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I have a residential customer with an in-ground, 35,000 gallon vinyl lined pool. They have an older Outdoor Pro wet end connected to a single speed RECHAMPS--115 1.5 HP motor (US Motors 1081 POOL MOTOR). The thing is making a lot of noise and the flow has plummeted to nearly nothing. As the...

I have a commercial customer that uses Accu-Tabs for chlorinating their largest indoor pool. They think that their more recent deliveries of tabs lack the punch of the originals. Is there a way to dissolve X grams of cal-hypo in Y ml of distilled water to see if the tabs are up to the 65% to...

Mostly as an experiment, I have taken on one residential client. They have a 35,000 gallon vinal lined, unheated, uncovered backyard pool in central Mississippi. They have been chlorinating it nilly-willy by tossing trichlor tablets into their skimmers. Their CYA is presently at 67 so they...

I never got an answer from Taylor about that one fluky series of FAS-DPD FC tests I encountered back in March. It is now the only chlorine test I do unless I am demonstrating the straight-up DPD method to one of my lifeguards. I love having a confidence level in my results give or take 0.2...

I have just drained, cleaned, plastered and refilled my "smaller" 150,000 gallon outdoor pool in preparation for reopening in May. As I dump 50 lbs of CYA and 400 lbs of Calcium Chloride into the pool just for starters, I start thinking about erosion feeders. The way I am doing it is to pour...

In the summer, I have eight pumps drawing liquid chlorine and muriatic acid out of six barrels in three locations. The chemicals are dispensed automatically as required and those requirements can quintuple between opening in May and the heat of July and August. All of this leads to a lot of...

I recently got certified as a Chemtrol field service rep and got my two Chemtrol 250's online again after years of disuse. This has allowed me to target my free chlorine levels in the 1.5 to 2.5 range without fear of dropping below one. We use the standard Taylor DPD chlorine reagents for...

My biggest pool (420,000 gallons and 6,885 sq. ft. if surface area) is losing almost 5,000 gallons per day. More perplexing, the water is not just vanishing—it is pouring out the end of the pipe it normally exits when we are backwashing or rinsing the filter. I have replaced one 6" butterfly...

I manage two large semi-public pools in Central Mississippi. One is 420,000 gallons the other is 125,000 gallons. Neither has any type of cover. Both are slated to be replastered this off season. In the past these pools have just been totally ignored from Labor Day through Memorial Day ever...

I have been pumping 4 gallons of industrial bleach nightly into my 125,000 gallon reservoir pool since Memorial Day and it has been a pretty stable 3-5 in the morning and 1-2 at the end of the day. Recently, I had to up that to 5 gallons. Yesterday, I turned up the dial to 6½ gallons. This...

Over the past few months, I have become the "chemical czar" over 800,000 gallons spread out over four pools in three locations. This has been a 100% learning by doing, TFP and YouTube exercise. In the land of the blind, the one-eyed man is King. One of my outdoor pools is a 126,000-gallon...

My 30,000 gallon, 91°F Therapy Pool has been a little low on the calcium hardness scale since I took it over. It has also been a bit cloudy. The first time I dosed it with 25 lbs of calcium chloride (which I purchased from my local pool chemical supplier) the water miraculously became crystal...

Moved from here. I inherited a sealed 55 gallon drum of 12½ Sodium hypochlorite that had been sitting outside in the sun for two years. The chlorine straight out of the barrel tested 0 PPM. While we are on this subject, I manage the chemistry and infrastructure of five YMCA pools (three indoor...