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Great thanks for your help:cool:

During an ascorbic acid testament it was recommended to use polyquat 60 while chlorine was low, is that the same as a store bought algaecide? If not where does one get polyquat 60?

OTPirate thanks for your help. I put the vitamin C on it and stain disappeared immediately. The last treatment I used worked really well but I don't think I used enough sequestering agent to keep all the metals in solution. I'm going to touch up the stains this weekend with the ascorbic acid and...

Swampwoman thank you so much for your help. I have a couple of questions: 1- can you recommend a good sequestering agent? 2-when you raise the chlorine slowly what is the ideal ppm to shoot for? 3-can I use an algae control agent (left from previous owner) while I'm slowly raising the chlorine...

My liner started getting this yellow stain to it so pool place recommended 2 bottles of stain remover. I did it last week and it was amazing the pool looked great but after a few days the stains are starting to come back. :confused: Any thoughts?

How do you raise alkalinity in pool?

Thank you to everybody who posted, its so nice to know there are so many people out there willing to share there knowledge. Thanks again.

Thank you this is very helpful. Do you think I could move ahead with the stain treatment in the next few days?

I'm new to pool ownership. I have a 16X32 vinyl liner pool. I have some stains and wanted to remove them, when I took my sample to pool store they said my calcium was to low 50 ppm and I needed to add some "calcium hardness increaser". They want me to add 25#'s of this not all at once but over a...