PH not moving down Help! closer!

[newtotubbing]

My PH is stuck at around 8.0 or so.  I am using Taylor test kit, have added ph down now 3 times for the past week it it won't move.  I just added 3 TEASP00NS of Spagaurd PH Decreaser just now and nothing!  Still at 8.0.

I though it was going to drop over time but it isn't.  
Added PH decreaser isn't working.


What to do.?

Jonathan

[Vinny]

Your PH may be way over 8 and that may be the problem.  The Taylor kit only measures to 8 and anything above will read the same.

I don't know if the Taylor booklet explains how to get readings when the PH is off the scale.

[steve771]

The Taylor kit includes an "acid demand" test.  Basically, after doing a pH reading, you add another reagent drop by drop to the vial, mixing and counting each one until you get a color change from the original pH.  Then, consult the Taylor book for the amount of ph down to add.  Hope this helps.

[newtotubbing]

You might be right about that.

Still don't know what to do, but you suggestion is a start in the right direction.


Jonathan

[Brewman]

Try taking your water to the dealer.  They should be able to advise you on how much ph down to use.
Our water is really high in ph and alk, and I have to add a lot more than a couple thingys full to move it into range.
Brewman

[newtotubbing]

Having people over for NYE and can't make it to the dealer.  Last time I was there I followed the directions of the computer analysis but it didn't go down.

I am going to de the acid demand test now.

Jonathan

[newtotubbing]

Ok,

I did the acid demand test twice, pretty neat, didn't know what the was before this thread!!!!

It needed 4 drops to bring it down to around 7.4.  Book says to add 4.93 ouncesfor 1000 gallons so for 500 gallons it should be 2.465 or 2.5ounces of Dry acid (93.2%).  Next stupid question, I do not have a scale so how do I know how much 2.5 ounces is in TABLE/TEASP00N talk?

Making progress!!!!

Jonathan

[stuart]

Not rocket science, I just consider a TABLESP00N about an oz, in fact I use the small cap on a 1 lb bottle overflowing and consider it about an oz...

[stuart]

BTW, that's a HEAPING TABLESP00N! One level TABLESP00N is about 1/2 of a fluid ounce.

[newtotubbing]

But the book is refering to dry acid.  So that rule still applies?  So I am looking at 2 1/2 heaping TABLESP00NS?

Thanks.

Jonathan

[stuart]

But the book is refering to dry acid.  So that rule still applies?  So I am looking at 2 1/2 heaping TABLESP00NS?

Thanks.
Jonathan

I'm refering to Sodium Bisulfate and yes 2.5 sounds right at your ph level and tub size....

[newtotubbing]

Yep, Sodium Bisulfate, Spa Guard brand.

I am going to administer the medication to the patient now, Doctor!

Jonathan

[stuart]

When I add that much I always dilute it in a bucket or bowl first...

[newtotubbing]

Oooops.

I just added into the spa a sprinkle at a time, with the jets on.

Oh well.

How long should I wait before I check PH again?  30 minutes?


Jonathan

[stuart]

Your fine, I just try and make sure that none of it can rest on the bottom of the shell.

Just for grins leave it until tomorrow and see how it looks, sometimes we wind up overdoing it when we don't need to just because we are anxious for a change.

BTW, what time is it there?