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thank you. did not know that and assumed there was a standard formula. Not even sure how I found it. I assumed it was through a TFP link.

Yes, I'll use baking soda in future but I already bought this so figure I'd use it if harmless.... https://app.poolcalculator.com/

PS It's also 80-120 on the pool calculator site- to add to my confusion.

I am clearly not used to these new numbers yet! (100-125 range @ Agway). Thank you for setting me straight. If I do ever need to raise it, though, can I use what I have (bioguard balance product) without affecting CYA or something else critical?

Thanks for your reply. I just checked the ALK again and it's at 80 (CYA still at 95/100). Since I have a whole bag of Bioguard alkalinity increaser can I add this without affecting my CYA levels? I don't want to go backwards!

Hello, I did not know about the dangers of pucks until this season so have removed about 4-5" of water three times this summer but the pool is 24,000 gallons and we now have a local water use advisory so I can not do any more with this. I was able to get it down from 160ish to 100/110 and it...

Thanks for the tips and encouragement.

Hello again. Raising my chlorine level seemed to take care of the beginnings of what I thought was going to be yellow algae. Very sparkly. My CHL is maybe around 10 right now or a bit higher. My kit arrived. But it's a bit intimidating! I tried the chlorine test unsuccessfully so will try again...

Hello, yep, until my test kit arrives (next day or two) this is the best I have to work with.

It vacuums up. There was none yesterday since I raised the chlorine to probably about 14 or 15 for my 132 CYA. And the water is sparkling clear. I did see about a 3" piece in one spot this morning. This is what it looked like last year and then the water did get that yellow algae cast-- no...

Hello again. The pool looks totally clear (so slightly off in deep end) but in the mornings I see small patches of what I think are yellow algae. They seem to come back to the same places but not always (ledge and side wall mostly). Here they are attached. I vacuum in the morning then it looks...

Thank you for your note. The pool is very clear. By tomorrow morning I may see a few small spots of the yellow algae but have raised the chlorine now to 11.65. CYA is 132 (according to Agway if it can be trusted) So when I look at the CYA chlorine relationship charts it looks like my suggested...

This concept just really blows me away. Why after all these years do I not know this stuff! this morning's agway test came in at CYA 131, ALK 108, PH 7.8. The combined chlorine went from 0 to 1.16 after adding a gallon of oldish liquid chlorine. I put in a bag of smart shock and am planning to...

Done. thanks.

It was some random site that I read that. Maybe a pool company anxious to sell more algaecide..... the pools looks good. I can just see that overnight small patches of this are growing still.

Too funny!!! It still look very inviting but Dang if I don't keep seeing very small patches of what I think is yellow algae. I am about to hit it with liquid chlorine. I have stopped using the pucks! I am reformed though I hate handling the liquid chlorine. Perhaps people have sorted out a trick...

thanks for your reply. This is a whole new concept of pool care for me! I will pull puck out and put in some liquid chlorine to try to get these bits of algae under control. I saw that along with mustard algae can come ecoli - no idea if this is true so that is why I have been worrying about...

Thank you but if I raise the FC to be coordinated with the CYA, can we still safely swim in it and do you know about the health affects with a trace amount of yellow algae but still mostly clear water? I will order a test kit now but worried about how to manage this in the meantime.

Hello, this is my very first post. I can't believe I haven't discovered you all before now. I am thanking you in advance. My cool is very clear in the shallow end (3'), but very slightly not sparkly in the deep end (8'). A couple things going on: my Cyanuric acid level is now above 160, very...