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Good health insurance for a start. Ionizers cannot be marketed for use without normal chlorine levels in the US because the EPA does not consider them to be safe.
20K Gallon 20X36 Vinyl Inground
Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat
A pool without the appropriate amount of chlorine is at high risk of person to person disease transmission of viruses, bacteria and other pathogens. Especially in kids.
Start here, ABCs of Pool Water Chemistry
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2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach
I realize you're new to this and trust that someday you'll see the humor in this statement.I don't know how to take care of a pool but I know I don't want any chemicals
Please consider that the very water that you're filling your pool with has already been "chemically treated" to preserve human health...since fortunately you're not from Flint Michigan
Chemistry also involves mineral components and their interactions, and ionization in that sense is still an interaction after a fashion. So don't believe the hype about "natural" pool treatment...natural aproaches to water purification are way more complex and require a much greater scientific command of chemistry "Natural" that does not involve this level of knowledge is actually negligence
Waterborn illness is a very real and largely under reported phenom. You will not find any scientist worth beans who will not readily admit that chlorination trumps all else for sanitation and kill rate. Just ask WHO. The CDC. So the KISS principal as applied to pool care is actually chlorine maintained at 7.5% of your CYA. It is simple and easy to achieve with a good test kit (TFTestkits.net )and some bleach. I hope you dig in to this site to learn more!