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High ph after 30mins of new water


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Hi,

Has anyone got any ideas what I am doing wrong.

I got a used spa that I pipe flushed twice and  then had an issue with foam. That I have since worked out was comming from the head rests.

So to be on the safe side 

I again Pipe flush spa 4 days ago

Super clorinated spa for 72 hours

Today emptied and cleaned spa

Filled up with fresh water from mains.

Ph 7.6

Added bromine tablets to skimmer basket

Added 25g of non chlorine shock as per manufactures instructions

45 mins latter ph showing 8.2

Bromine levels not up yet but I expected that after only 45mins after adding it.

The non chlorine shock says it does not effect the water chemistry.

The water temp is only 17 as I decided this time I was not going spend electrity until everything else was OK.

I am not used to bromine as I use chlorine in my pool. Does the bromine cause the ph to rise?

Any ideas appreciated.

Thanks

 

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Hi, thanks the reply. So took sample to shop to do test. Ta is at 60

Digital ph showed ph at 7.2 and they did a tablet test that showed of the scale red.

They said that to bring up the ta to 100 and then should sort the ph out.

Brought some test straps and they show ph at 7.2 and ta at 80

 

So it's great getting diffrent results :(

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James,

Suggest that you get yourself a good quality liquid test kit, such as the Taylor K-2005, which will work with Bromine or Chlorine.  It is very hard to troubleshoot water chemistry problems with test strips.

You should not really be getting a pH that high with a TA of 60 and the use of acidic chemicals like MPS and Bromine.  It makes me very suspicious of your testing. A pH of 7.2 seems likely with your situation.

If you raise you TA, your pH will tend to go and stay higher, so I dont think you should do that yet. 

Get yourself a good test kit and come back with the results and someone on this forum will be able to help you sort it out.

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