Sand filter medium

[mknauss]

SLAM has nothing to do with the SWCG creating scale. I assume you are running your SWCG during the SLAM Process

 

[TRUK71]

No the swg is off

 

[mknauss]

Then it is not making that scale! Something is not right as stated earlier.

 

[TRUK71]

Then it is not making that scale! Something is not right as stated earlier.

My ta has been in low 100s could that be an issue?

 

[mknauss]

Not if the SWCG is off. It is the only device that makes that kind of scale. You are absolutely sure you are not adding any solid chlorine products.

 

[TRUK71]

Only solid that has been put into pool has been cya and the phDown I've used this year. Everything else has been a liquid. I've had the powder issue all this season, not just during slam so swg hasn't been off until I've started slam.

 

[TRUK71]

Not if the SWCG is off. It is the only device that makes that kind of scale. You are absolutely sure you are not adding any solid chlorine products.

Wouldn't it just be by the returns if it was just from swg?

 

[mknauss]

Normally. As stated earlier in this thread. Something is not right.

Can you take a sample of the substance and put it on a white surface and get as clear a picture as possible? Something seems off about it.

 

[TRUK71]

Will muratic acid react to anything else besides calcium and create the bubbling effect?

 

[mknauss]

It will react to various calcium scale compounds with varying orders of reaction. Calcium carbonate is the most violent. Then calcium sulfate, calcium phosphate, etc.

 

[TRUK71]

It will react to various calcium scale compounds with varying orders of reaction. Calcium carbonate is the most violent. Then calcium sulfate, calcium phosphate, etc.

So just calcium compounds, not if it was an organic? Any other metals?

 

[mknauss]

Acid corrodes metals. Did this start when you started using the sodium bisulfate? You do know that product will destroy the SWCG, right?

 

[TRUK71]

Maybe my csi was way off early this season and didn't know it because I didn't track it. I could reenter those test numbers now and see what csi was then.

 

[TRUK71]

Acid corrodes metals. Did this start when you started using the sodium bisulfate? You do know that product will destroy the SWCG, right?

I do now....and it was before. It was right as we opened pool and I didn't add any phdown until well after opening pool.

 

[TRUK71]

Looking back at tests most of my csi shows a negative number. Only really see 1 high number of +.5

 

[TRUK71]

Acid corrodes metals. Did this start when you started using the sodium bisulfate? You do know that product will destroy the SWCG, right?

Pool manufacturer says muratic acid makes calcium fall out of suspension and you say phdown destroys the swg. Not saying your wrong. Just hard to know what to do at times.

 

[mknauss]

Do you have any other odd equipment not listed in your signature? Anode, ionizer, etc?

 

[mknauss]

Muriatic acid does not make calcium fall out of suspension. Pool builders are typically clueless when it comes to chemistry.

 

[TRUK71]

Do you have any other odd equipment not listed in your signature? Anode, ionizer, etc?

No sir

 

[JamesW]

Pool manufacturer says muratic acid makes calcium fall out of suspension

I doubt that anyone says that.

Ask them, in writing, to clarify their position on that.

Someone misspoke or you misunderstood.

In any case, get a liter of distilled water and add 200 milligrams of the precipitate to the water.

Allow the precipitate to dissolve and then test the water for TA and calcium.