Yellow spots

[Nayabsaiyed]

Hi all, i am new to this forum and novice in maintaining the pool. I fired my pool guy after i found out that he was charging me for the visits he never made during winter.

So here is the problem. I see these yellow spots in one area as if something is leaking from the plaster. Do you know what this is?

Swg - 15000 - plaster

Just took the readings
Fcl 3.5
Ecl3.5
Ph 7.6
Alk 77
Ch 360
Cya 73

 

[tim5055]

Welcome to TFP!!

Yellow, or more orangish - like rust?

What are you using to get the test numbers? Results like 77 & 73 seem very specific.

 

[Nayabsaiyed]

Thank you!!

Yes like rust. Can not upload pics here.

I bought lamotte coloriq digital machine.


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[tim5055]

It very well could be rust from the shell of the pool if the plaster/gunite is beginning to break down. Or it could be rust from something that fell in the pool and sat in that spot and rusted..

Photos would really help. You can't upload them using Tapatalk, but can from a computer.

As to the Lamott ColorQ members here have reported that they tend to loose accuracy with age as well as a limitation of only registering a FC level up to 10. Above 10 it just reads "High". With a CYA of 73 (we call it 80) your FC target level should be 9 (unless you have a SWCG), which is close to the limits of your meter.

For this reason we are generally reticent to trust their results. We recomed everyone have their own accurate drop based test kit like the TF100. With that you can regularly compare readings and see if your ColorQ is beginning to "drift" off accuracy.

 

[Nayabsaiyed]

 

[Nayabsaiyed]

SWCG is shut off due to winter. Should i manually start it or add bleach?

 

[tim5055]

SWCG is shut off due to winter. Should i manually start it or add bleach?

The SWCG will not produce when the water is cold, so you need to manually chlorinate.


Those photos do appear to be rust to me.

 

[Nayabsaiyed]

Ok thanks. Were you able to see the pics? What do you think?


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[MarianParoo]

They look like rust. For now, you can remove them with some vitamin C tablets in a sock and scrub away. Keep an eye on your FC and add liquid chlorine/bleach as needed. As for the underlying cause, there are others better equipped to answer that.

 

[Nayabsaiyed]

Thank you!!

They look like rust. For now, you can remove them with some vitamin C tablets in a sock and scrub away. Keep an eye on your FC and add liquid chlorine/bleach as needed. As for the underlying cause, there are others better equipped to answer that.

 

[Nayabsaiyed]

I was referring to this recommendations - Pool School - Recommended Levels

According to this it states the FC should be 3-7. What am i missing?

It very well could be rust from the shell of the pool if the plaster/gunite is beginning to break down. Or it could be rust from something that fell in the pool and sat in that spot and rusted..

Photos would really help. You can't upload them using Tapatalk, but can from a computer.

As to the Lamott ColorQ members here have reported that they tend to loose accuracy with age as well as a limitation of only registering a FC level up to 10. Above 10 it just reads "High". With a CYA of 73 (we call it 80) your FC target level should be 9 (unless you have a SWCG), which is close to the limits of your meter.

For this reason we are generally reticent to trust their results. We recomed everyone have their own accurate drop based test kit like the TF100. With that you can regularly compare readings and see if your ColorQ is beginning to "drift" off accuracy.

 

[tim5055]

I was referring to this recommendations - Pool School - Recommended Levels

According to this it states the FC should be 3-7. What am i missing?

You are missing CYA/Stabilizer. Our FC recommendations are all based on the CYA of the pool. You can't just look at that one chart.

Try these three articles to explain it:
ABCs of Water Chemistry
Recommended Pool Chemicals
How to Chlorinate Your Pool

Here is an example of a ColorQ post: ColorQ vs TF100

 

[Nayabsaiyed]

Thank you for all your replies.

I just went to the pool store to test the water. Here is what they are suggesting. Attached image. Do I really need to do the PHOSFree treatment? Or should i do the vitamin c tablet treatment?

You are missing CYA/Stabilizer. Our FC recommendations are all based on the CYA of the pool. You can't just look at that one chart.

Try these three articles to explain it:
ABCs of Water Chemistry
Recommended Pool Chemicals
How to Chlorinate Your Pool

Here is an example of a ColorQ post: ColorQ vs TF100

 

[Marcion333]

For this reason we are generally reticent to trust their results. We recomed everyone have their own accurate drop based test kit like the TF100. With that you can regularly compare readings and see if your ColorQ is beginning to "drift" off accuracy.

as an alternative pool chemical test kit, i have been using taylor's K-2006C kit and have liked it very much.

 

[tim5055]

Thank you for all your replies.

I just went to the pool store to test the water. Here is what they are suggesting. Attached image. Do I really need to do the PHOSFree treatment? Or should i do the vitamin c tablet treatment?

No, following our methods PHOSFree is not generally recommended.

- - - Updated - - -

as an alternative pool chemical test kit, i have been using taylor's K-2006C kit and have liked it very much.

You are correct, the K-2006C is very similar to the TF-100. They both use Taylor reagents. It is just that the TF-100 is more suited to a residential pool owner and a TFP follower as it contains more of the reagents we generally use and less (or none) of the ones we seldom if ever use. But, folks need to be careful comparing prices because the K-2006 comes in sizes, designated by a letter. The basic K-2006 has .75oz bottles, you need to get the K-2006-C to get the larger bottles that you want. Even then it is a little short on the reagent & powder for the FAS/DPD test.

 

[MarianParoo]

According to this it states the FC should be 3-7. What am i missing?

I think you are missing this: Pool School - Chlorine / CYA Chart

Do you have a salt (SWG) system?

 

[Nayabsaiyed]

Yes it is salt system but chlorinator is off due to cold temperatures.


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[MarianParoo]

Then, assuming your CYA is 80.....????? Your FC should target at 9 with a minimum of 6. You need to treat it like a non-SWG pool.

- - - Updated - - -

Oh, and you can still do the vitamin C in a sock method on those spots.

 

[Nayabsaiyed]

Thank you so much. I am going to add bleach tonight.


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[MarianParoo]

Great! Let us know when you try the Vitamin C tabs on those spots.