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On an inherited inground concrete pool, perhaps 20 years old. At random times after backwashing the Hayward sand filter with an old Multiport valve ('SFC' brand if that means anything) so the handle will have been revolved 360 degrees and put into two positions - 6 o'clock for 3 mins, then 10...

Is it true that pH is important so that automatic robots can climb walls? And IF this is true, why please?! I'm puzzled!

Last year the pool (inground concrete) was totally resurfaced with plaster (sprayed on after old had been scraped back and new applied about half-inch thick, then smoothed over to finish.) Now, 18 months later, it's possible to just rub your finger lightly over the surface (underwater) and tiny...

Last year I posted about my problem of wanting to convert to chlorine an outdoor bromine pool that had full sun. Had interesting replies (thanks to you all) but the final, unanswered question was this... 'If I now add chlorine shock AND chlorine tablets to the feeder, I'm wondering if, in...

I need to change to sponge rollers from PVC plastic toggles on a Tiger Shark Drive/Hayward Aquavac Drive. If anyone has done this - can you please tell me how? Thanks! :?

With a 21000 gal outdoor pool in sunny position in France I was sold the idea of using bromine with an auto feeder. Useless (if I had but known of this forum first!) as impossible to keep the level high enough. So, would it be difficult to change over to chlorine using the same gear and not...