The Pool & Hot Tub Alliance announced this week that a supplement to the ANSI/APSP/ICC/NPC-12 2016...
The Pool & Hot Tub Alliance has awarded the 2019 Dr. R. Neil Lowry Grant to the Pueblo Department...
The Texas legislature has passed HB 2858, which allows municipalities in the state to require...
Most pool service technicians are not aware that they have an alternative to draining pool water to lower TDS, calcium, salt and conditioner.
It is common currency among many service techs that when chlorine is becoming inactive due to high TDS levels, that TDS can only be lowered by draining water and refilling with source water that has been tested to insure it is low in TDS. But that's just no longer true, according to Samantha C. Larimer, co-owner of SaveWater Mobile Pool Filtration.
Mobile pool filtration systems, using reverse osmosis technology, can lower TDS, salt, cyanuric acid, calcium and even phosphates without the need to subject the pool to the trauma that may occur by removing the water (lifting, plaster delamination, etc.), she says.
There are several companies in the U.S. that offer this mobile RO filtration service onsite, including Larimer's company in San Diego.
The idea grew from a seed planted in a pool, Larimer says: "We have a pool company in San Diego, and my sister has a pool company in Arizona, and we were swimming in her pool, and she was talking about how often they have to drain due to the calcium.
"And I was saying, 'we can't even drain in San Diego because of all our restrictions, and it's really tough when you have a high TDS pool and it's just eating up the chlorine — the chlorine is doing nothing.'
"My husband said, "Why don't we just put a desalination unit on a truck. And the next thing you know, he's off building one. After that we went on the Internet and saw that there are several companies doing it."
Mobile RO (for reverse osmosis) works using fairly standard desalination technology that has been used for decades throughout the world to turn seawater into fresh water. "The one we use is a system we bought in Florida; we flew out there, picked it up and drove it back here in a U-Haul," Larimer says.
Basically, the system is just another filter, but this one can filter so fine and so fast, Larimer says, it can pull unwanted TDS and conditioner and even salt out of pool water in a single day, giving the pool a level of clarity rarely seen, even after thorough DE filtration. "It's like a dialysis machine. You run a line to the pool, pump the water through the machine, and then back into the pool."
There is some loss of water in the process, Larimer says. After the procedure, even on an apparently crystal clean pool, the tank on the truck will be left with several thousand gallons of cloudy, murky water which contains concentrated filtered debris from the pool, which must be dumped. But this loss of water is very small compared to what would be lost in a complete drain and refill.
"Our process might cause them to lose 5,000 gallons, depending on the size of the pool, the amount of TDS, how much conditioner, or salt in the pool. That water that we do end up discharging has all the minerals in it, it's quite cloudy-looking.
"The whole thing takes us a day. We hook it up in the morning, and take it down about 5 o'clock. And people can swim in it that night. You can visually see a big difference in the water that has been through the machine."
The business has really taken off in the last two years, Larimer says, and for all sorts of different reasons, not all of them water conservation related. "Some people just don't want to drain their pool."
Many of us may have had the unfortunate experience of adding soda ash "wrong" to pool water, resulting in a pool that looks like it is filled with milk. In fact, we refer to it as "milking" a pool. Why does that happen?
When we decide, for example, to raise the pH of a pool from 7.2 to 7.6, we calculate how much soda ash is required for that size pool to achieve a 0.4 pH unit increase. A solution of soda ash (sodium carbonate) has a pH of above 11, so when added to pool water the pH...
We're doing research on our readers' podcast habits. Please fill out this quick survey — it shouldn't take more than two minutes to complete — and you can enter to win a $50 Visa gift card. Thanks for your time.
The Pool & Hot Tub Alliance has awarded the 2019 Dr. R. Neil Lowry Grant to the Pueblo Department of Public Health and Environment at the National Environmental Health Association’s 2019 Annual Education Conference & Exhibition awards ceremony in Nashville, Tenn.
Given in the memory of Dr. Robert Neil Lowry, a...
The IoT Movement is continuing to take America by storm. According to Statista, smart home devices — or internet-enabled devices that can remotely monitor and control areas of the home — are experiencing exponential growth, which is only expected to accelerate.
That surge speaks to a near-universal interest in products that shoulder the burden of home ownership and in many ways lessen the impact of life's annoyances. Instead of manually sweeping the floor, you can deploy a vacuum...