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I removed the closure to check the sand level and now can't get it back on without leaks. I replaced the gasket (new) with a coating of pool lube but still leaks. It is losing all pressure when the pump is off which is causing me to lose prime, and my pump is higher than the pool so it takes...

You are both right. According to the Hasa website they make Blue Whale, and an old TFP post states Hasa uses one letter followed by four numbers, first three day of year and last is year. Thanks!

That is all there is. I checked all over the box and the individual jugs.

Anyone know how to read their code? They only print a letter followed by four numbers. Not Julian like I am used to.

I get a substantially higher reading when the water is cold. My last test one month ago with water temp 80 was 50 and I have not added any CYA since then but did backwash/re-fill which would have dropped the level. Today I ran a test at water temp 54 and it was 70. I knew that was way too high...

I live in Austin and shut my SWG down for the season once the water hits about 60. You can get a three gallon pack of 10% chlorine, HDX brand at Home Depot for about $10 and it lasts a long time at these water temperatures. And in my experience Jim is right, shutting down the SWG more than...

I have the same question. I have two skimmers and each one has two holes on the bottom and a cover that can be rotated to either partially or totally cover one of the holes. I have left them all open since that is how they were when I bought the house. Each skimmer and the main drain have their...

I swapped out my existing check valve with a FlowVis (easy DIY job). I find it is much more effective to monitor the drop in flow rate than to rely on the pressure gauge. I have a Pentair sand filter and they recommend backwashing when the flow rate GPM drops by 30% below the clean rate. I get...

After using dry CYA when I first got a pool I switched to Natural Chemistry liquid CYA (they call it "Instant Conditioner"). Works in the water immediately since it does not have to dissolve and is a liquid so dosage is easily measured in any measuring cup. No dangling socks in your pool for...

I buy mine at Home Depot. Comes in a package of two, one gallon bottles and is the same strength as what they sell at Leslie's. Home Depot keeps them out so you can just grab it yourself. At Leslie's you have to wait for someone to get it from the back.

When I was in pre-purchase of my house that had an existing salt pool (my first pool) I had a pool builder come inspect it. He said salt pools "are almost impossible to keep balanced" and quoted a conversion to a Rainbow Chlorinator. Fortunately I did my homework and found this site before...

For what it's worth, I have found that during the strong sun in central Texas summers in an unshaded pool I lose about 10 PPM CYA per month with no water removal (just filling due to evaporation and minor splash out). SWG that I run at TFP recommendations of 80 CYA and 4-5 FC (Thank you TFP as I...

Is the deep clean more effective if you first drain the water out of the filter? Wondering if exposing the top layer of sand makes it easier to remove debris.

Last night the display started displaying No Flow and the red and orange lights alternate flashing on and off. Flow meter reads 62 GPM (per the manual this unit requires a minimum of 40 GPM) and has worked in the past with flow as low as 35 GPM so definitely not a pump flow problem. Salt is at...

Ugg. A good reminder of the importance of double checking units of measure. Thanks

The Taylor K-1766 "Potential Interferences" information states that orthophophate levels greater than 25ppm causes positive interference. Anyone know how much to adjust the result based on a phospate level that exceeds 25ppm? Mine tends to run 200-300ppm.

Is the MPS not effective/waste of money or is it more an issue of it potentially corrupting the FC test? I had read (not on this site) that MPS is the preferred shock for SWCG pools so that is why I have been using it (and have quite a bit left!). I am certainly not disputing your guidance, just...

At my CYA a SLAM will require very high FC levels (26). Will an FAS-DPD kit read that high (need to order one) and what is a safe level to allow swimming again? My family uses the pool daily so if it would take a while for swimming maybe I will maintain with additional chlorine and SLAM later in...

Testing with a Taylor DPD kit (using reagents R-0001 & R-0002). I have a waterfall that comes straight from the pump so I check the generator operation there (no issue with dilution by the pool water around a jet) and it is making chlorine. Also, since I am not manually adding any chlorine (just...

Potassium Monopersulfate

I find I have to add 1.5 pounds of non-chlorine shock about every three days to keep my FC up around 3-4. The FC slowly drifts down to about 1 at which time I add the shock and within about an hour the FC shoots back to 3-4. Then the process begins again, the FC falls over a few days, I shock...