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Posted:  5/22/2017 10:11 AM #26605
jclann
Member
Denver
Total Posts:13
Last Post:5/23/2017
Member Since:6/3/2008
Subject: High CYA readings?
He Everyone. Last summer my Cya test readings were around 35.

This spring they are over 200. What would cause that over the winter??????

Thanks, Jclann



Posted:  5/22/2017 11:26 AM #26606
Rob Cox
Administrator
rob@poolcenter.com
Total Posts:351
Last Post:6/29/2017
Member Since:4/18/2009
Hi there, another spring with more surprises!

Nothing should cause that. Using stabilized tablets (Trichlor) and stabilized shock (Dichlor) adds a small amount incrementally, but does not normally build too fast for pools with normal rainfall, and especially those who lower the water level for winter, and backwash a filter regularly during season.

But to go that high, I suspect a bad test? Are the reagents fresh, and the vial clean? Residue from other tests can corrupt a cya test. To add 150 ppm takes an awful lot of cyanuric, another remote possibility, but I've seen it before, where cya was mistaken for shock and dumped into a green pool (10+ lbs), which raised cya thru the roof of course.

Rob Cox
President
POOLCENTER.com



Posted:  5/22/2017 1:30 PM #26607
jclann
Member
Denver
Total Posts:13
Last Post:5/23/2017
Member Since:6/3/2008
Hi Rob,

Thank You for responding to my problem. Using new, fresh reagents. I am thinking of draining at least half of the water, and refill. Think that would be enough. Are you familiar with a cyanuric acid reducer called Bio-Active which is
added after a partial drain and refill,?

II have read some reviews that go from Horror stories, to "did not work" "if did the job".

Do you have any other ideas?

Many Thanks,

Jim



Posted:  5/22/2017 1:35 PM #26608
Rob Cox
Administrator
rob@poolcenter.com
Total Posts:351
Last Post:6/29/2017
Member Since:4/18/2009
Hi - I am familiar with Bio-Active but I've never used it, it's only been on the market for a short time. It claims to reduce 50 ppm per $50 bag. For you it would be cheaper to drain and refill, possibly. I would prefer to drain anyway, if it was my pool, just to have fewer chemicals in the water. But I would also retest, and recheck my methods to make sure I'm doing the test exactly correct, and mixing the reagent and pool water in the right amounts, and using a clean test vial, etc... you probably have already done that though!
Rob Cox
President
POOLCENTER.com



Posted:  5/22/2017 1:52 PM #26609
jclann
Member
Denver
Total Posts:13
Last Post:5/23/2017
Member Since:6/3/2008
Hi Rob,

Would you drain it all the way down?

THANKS for your help!

Jim



Posted:  5/22/2017 2:08 PM #26610
Rob Cox
Administrator
rob@poolcenter.com
Total Posts:351
Last Post:6/29/2017
Member Since:4/18/2009
Hi;

I would,l drain it - if it hasn’t been changed in a while. Although we don't promote it, most pools just generally have less water problems when the water is changed every 4-6 years, at least that’s been my general experience. Not so necessary for pools in high rain areas, or those with safety covers that lower the water 18” at closing, or for pools that backwash a lot of water, frequently. But, it couldn’t hurt to drain it all the way, or 85% of the water.

You could give the pool a little light acid wash (if plaster). If the pool is not in a topographically depressed area, or in an area with a high water table, there is usually no concern of hydrostatic pressure, but to be safe, always pump the pool to an area that won’t flow back under the pool, or to a storm drain or street gutter, and avoid very wet weather periods. There are several hydrostat caps in the floor of plaster/concrete pools that can be opened while draining, if there is concern of underground water pressure. Just chip out the plaster and unthread them with pliers.

Rob
[Edited on 5/22/2017]
Rob Cox
President
POOLCENTER.com



Posted:  5/22/2017 2:38 PM #26611
jclann
Member
Denver
Total Posts:13
Last Post:5/23/2017
Member Since:6/3/2008
Hi Rob,

Could you give me some details on The acid wash. Is that something I could do, or should I hire it done?

AGAIN, MANY THANKS FOR YOUR HELP!

Jim



Posted:  5/22/2017 5:25 PM #26612
Rob Cox
Administrator
rob@poolcenter.com
Total Posts:351
Last Post:6/29/2017
Member Since:4/18/2009
Sure, check out this page - one of google's favorites! http://www.poolcenter.com/acidwash
Rob Cox
President
POOLCENTER.com



Posted:  5/23/2017 6:47 AM #26613
Terri B
Member
Total Posts:30
Last Post:5/31/2017
Member Since:5/22/2006
I tried Bio Active last season when CYA unexpectedly zoomed. Yep $50 per bag and did absolutely nothing. What a total waste of money. I stopped using tabs for a while and the CYA finally settled down. We use a loop loc and are on a well and no way we can partially drain and refill so I was thankful. Opening this weekend so we shall see what we get this time with CYA.



Posted:  5/23/2017 8:14 AM #26614
jclann
Member
Denver
Total Posts:13
Last Post:5/23/2017
Member Since:6/3/2008
Hi Terri,

Thank you for your response.

I have decided that I will drain the pool and have it acid washed which it needs ,

Jim





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