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New lower price for CL at my HD in So Cal. Check out the date codes from last year.

I had similar problems with my Stenner system a while back. It turned out to be an internment suction side leak at some compression fittings I used. I installed a flow meter on the suction side and could occasionally see an air bubble go by. I found and replaced the cracked hose and all was well...

You don't need to ask your barber if you need a haircut. The answer is always yes. You also don't need to ask your pool store if there is something you need to get for your pool

I suspect the OP is not mixing sufficiently - if at all - between each drop of R-0871. Don't ask me how I know this, but I now have a Speedstir.

I’m going back to my trichlor bucket -- for a week or two. I’ve been burning through CL during the day even though my CYN is 50, or so I thought. I got some R-7065 50 ppm CNY standard to “calibrate” my testing and found I was reading high. I turned off the Stenner for now and plan on using some...

When I first arrived at TFP (via an outside link to PoolMath) a year ago having a weekly pool service, advice from a pool store, CYA 300 and ongoing problems with mustard algae I was looking for a solution. I had no idea what was wrong. When I plugged my pool's numbers in, I got a shock value of...

Re: Straddling the BBB conversion... Open PoolMath with normal values and set CYA to 300. Look at Mustard Shock Level and you will see 15. If you mouse over this field, the value helper correctly shows 154, but my first visits to Pool Math really confused me. I had CYA 300, was using pucks...

Re: Straddling the BBB conversion... The poolcaculator correctly reports the required mustard algae shock level for high CA levels. When I first arrived at TFP with CYA 300 and mustard algae, I was confused by Pool Math's error.