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That's great, nice to know that others don't use pH+ when doing an AA

I use a large pond aerator I was just concerned that it wasn't ideal when doing an AA treatment

Hi I need to raise my pH after AA treatment I don't want to raise my TA as well Is it OK to just aerate ( which I normally do) to just raise pH My pH is quiet stable and doesn't require much adjustment

You are correct about the discolouration of the plastic and they weren't like that from new but I can remove the discolouration with my fingernail The failure is at the exact same spot on all of them, some have shown signs of being bent at the failure point but haven't failed yet All the...

Most of the info is in my signature but the pump model is 81004 which is a 0.37kw which equates to about 0.5 hp The MPV is piped correctly and hasn't been run for long periods on backwash and if it went to waste it would by pass the filter When I run on recirculate or bypass there was no media...

That’s about right

Probably about 5 years I haven’t switched the MPV with the pump running There were more broken and bent laterals I was just concerned how the damage occurred

That wasn't the case as I had water in and the media went in slowly

Hi After replacing my laterals because of filter media coming back into the pool. I was wondering if anyone had an idea as to how they got damaged The only solution I can come up with is that when backwashing the area below the lateral becomes a void and then allows the weight to push down

The only problem I see is that you can suck in air

In the UK we get 14-15% sodium hypochlorite

Definitely a suction side air leak Check and lubricate your pump basket O ring, pump drain off plugs and inlet union There could be a leak between the pump and skimmer / main drain

Here is another one what fits into a return https://www.amazon.com/dp/B0026MTCOU/re ... dBb1XWZJ6Q I find my thermal cover keeps the heat in and out inside my enclosure which is like a greenhouse in the summer

But it would stop solar gain providing it’s not a solar cover

Aerate, especially at night I doubt that the concrete is causing it Cover when not being used and uncover at night

Although it isn’t recommended here because some one got burnt I use the 3M 4277 as the fumes are pretty noxious, they are reusable

I would suspect that you have a suction side air leak with the vacuum hose connected Does the pump basket have air in it when vacuuming Also is the flow normal without the vacuum connected

No I'm on mains water and am 100% sure it's metal staining as Muriatic acid, ascorbic acid and LO-Chlor No More Metal does remove it It's difficult for me to get Metal Magic here in the UK

Thanks for that Swampwoman I have previously done an AA treatment quiet successfully but it was a long job to get my chlorine back under control Remembering your post I was checking to see if there was a more effective way of treating the pool water without the prolonged wait to get the...

Some time ago I read a post about an alternative to AA for iron staining I think by Swampwoman (not sure) Can anyone guide me to it?

You want to use Pool Maths to work out just how much to use Probably try half the amount at first just to make sure you have the right quantity for your pool You don’t want to go to low

Hi Steve You're on the right track then I use muriatic acid (hydrochloric acid) to lower pH and aeration to raise it I bought my last lot on Ebay sometimes called brick cleaning acid. You want the 36% or there abouts Use gloves and protection as it's pretty noxious

You really need to run your pump to keep the water flowing while the temperature is low or winterise You may have some ice in the pipes but not solid yet and if you don’t run the pump they could freeze solid and crack your pipes

No don't release the prime just run your pump when you're close to freezing. Here in the UK we very seldom have to winterise unless you are far north It's normally the nights are when we get the lower temperature, even the -1 and -2 don't present a problem

Blue Horizons Chlorine Stabiliser - Cyanuric Acid - Chlorine Stabiliser Sorry that link above got messed up

I’m in the UK and don’t have a problem getting CYA search for chlorine stabiliser conditioner This link is one http://www.ukpoolstore.co.uk/a catalog/blue_horizons_chlorine_stabiliser_cyanuric_acid.html

Do you chlorinate with sodium hypochlorite, bleach That increases your salt level

My heat pump ices up especially in colder weather but the auto defrost cuts in and it melts The only problem is when the auto defrost fails and the ice builds up If this is a new installation I would think it’s normal operation