Recent content by aehaas

The photometer I recommended has accuracy ranges from 2 - 10% with the least accurate test (10%max) is alkalinity. The chlorine is at 5% within a test range of 0-12. ali

I have used the test equipment for at least 10 years. The photometer is that old. The pH meter needs a new probe about every 3 years, about $60. Ali

"Photometers are not accurate" Buy cheap and you get poor results, buy professional equipment and get professional results. I am a biochemist and stand by my recommendations. 'No connection to the products I recommend. Price is no object for me. (Though, like some, I do not necessarily spend...

Finally, get this: Pool eXact® EZ Photometer with Bluetooth® It takes the guesswork out of testing your pool. Many will say it is excessive but you get real, repeatable numbers for your tests. Yes, more costly at first but your saving in chemicals will make up for it in a few months. I do not...

I just came upon this thread. I had a similar issue some years ago. There are several issues involved but I am confident that solving them will quickly stabilize your pool: Use ONLY liquid chlorine. You have to get the CYA level down to 50-60 by draining out half the pool water and replacing it...

I am a biochemist and use this device for testing the water, have used it for years. I occasionally test it against the Talor drip methods just to verify all is working OK. https://sensafe.com/pool-exact-ez-photometer-starter-kit-with-bluetooth/ And gt this, best one I have ever had and does...

My pool is 32,000 gal and I live in the Sarasota area of Florida.

I am using the Pentair 200 SF filter as seen here. It is about 3 feet tall and 1 foot across: I am thinking it cost about the same as your repair bill might be.

I went through this issue about 3 years ago. I went with an oversized cartridge filter. Band name very fine filters can filter almost as good as DE. They are easy to clean. In fact I got two cartridges. I replace one and clean the other, put it on the shelf for a quick replacement if needed at...

So it seems that algaecide should only be used for closing a pool. Polyquat 60 will be degraded by chlorine, and by this experiment chlorine will be degraded by Polyquat 60. After reading Algaecide - Further Reading it is clear why Polyquat 60 is useful for closing the pool. So the next...

I figured that adding a maintenance dose of algaecide every week would allow me to reduce my SWG output of chlorine making it (the generator cell) last longer. I normally run a steady free Cl level of 4 to 6. I added some algaecide. Days later some visible algae started in places. I noticed that...

My photometer as listed above is accurate at the L1 level, for example, as documented below, for chlorine levels as shown. The meter comes with a standard that can be used to calibrate at any time. I tested the calibration months ago when I purchased the meter and again, after hundreds of tests...