chelated copper sulphate pentahydrate

TinkABell

Active member
Apr 3, 2017
32
Dallas, tx
#1
I'm wondering about everyone's opinion on using poolrx's copper sulphate pentahydrate algaecide unit to control and prevent algea in the pool. Yellow algea tends to like my pool and can return easily.

I have a 15,000 gallon IG pool with a DE filter.
 

domct203

Bronze Supporter
LifeTime Supporter
TFP Guide
Jun 3, 2015
3,959
CT
#3
Welcome.

I advise you stay away from any product that contains copper. Copper builds up over time and will stain your pool surfaces, and turn blond hair green.

I would suspect your algae returns due to inadequate sanitizer (chlorine) levels.

How do you normally chlorinate your pool?

Can you post a complete set of recent test results?

Sent from my K88 using Tapatalk
 

Donldson

TFP Expert
LifeTime Supporter
In The Industry
Jun 12, 2009
3,287
NW Ohio
#4
Welcome to TFP!

Opinion of copper: 100% against.

Proper chlorine levels in relation to CYA levels will prevent algae.
 

TinkABell

Active member
Apr 3, 2017
32
Dallas, tx
#5
Currently my levels are
Free chlorine 2.0
Combined chlorine 2.0
PH 7.6
Alkalinity 120
CYA 120

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Thank you.. Just trying to figure out this pool stuff on my newish house
 

randytsuch

LifeTime Supporter
Mar 29, 2008
256
Los Angeles, Ca
#6
Your CYA is way high.
With high CYA, you need much higher FC levels
http://www.troublefreepool.com/content/128-chlorine-cya-chart-slam-shock
That's why you have algae problems, you need to have very high FC at that CYA.

Don't use tablets, they raise CYA. Use bleach or liquid chlorine.

Really need to do a partial drain to drop CYA to something reasonable, then use chart to figure what FC should be.
And CC of 2 is high, really should have little to no CC.

BTW, after you get the CYA under control, consider adding borax or boric acid. It helps control algae, and just makes the water look better.

Randy
 

wjr75

LifeTime Supporter
Jun 6, 2013
879
IL
#7
Polyquat 60 algaecide if you use anything which doesn't have copper. Don't really need it if you keep the CL/CYA at the right level.
 

TinkABell

Active member
Apr 3, 2017
32
Dallas, tx
#8
Thank you... I guess I'll start trying to bring down the cya while keeping chlorine high. Any suggestions on how high to keep chlorine while cya is high?

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Just saw other thread... Ok is it safe to swim with chlorine at 8?

Is partial drain only way to bring down cya, or will a cya reducer work?
 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
9,082
Evans, Georgia
#9
Out of the dozens of folks who tried the CYA reducer, I think 2 of them saw a modest difference. 100% of them felt a lightening of their bank accounts.

You need to drain about half your water at least. If you use a SWG a bit less than half, if you don't have a SWG you need to drain a bit over half....like 60%

Refill and then never use any product that adds a hidden second ingredient (cya, calcium, copper, etc) in your water. Best to use single ingredient pool supplies when you're new to pool care so that you don't get caught with an unexpected surprise problem like too high CYA. Liquid chlorine is just that, only chlorine for the pool. Arm and Hammer baking soda is the exact ingredient as Alkalinity Up products yet 1/3 the cost. Learning things like this simplify the care of our water and pools.

Do you have one of the test kits we recommend?

Yippee :flower:
 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
9,082
Evans, Georgia
#11
The TF-100 is the preferred test kit....more reagents for the tests you do the most often. Easy to obtain refills (Sale on refills every March it seems)

Tftestkits.net ships from NC..... PoolSupplyWorld.com ships from CA. Pick which one you think will get the kit there to you fastest :)

Yippee :flower:

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Oh yeah...as to bleach... get the freshest, cheapest stuff you can find. 8.25% is the standard laundry stuff, but if you check the pool aisle at wallyworld they sell stronger stuff (10%) which often goes on sale. No "outdoor" or "cleaning" or "scented" bleach... just plain old bleach.
 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
9,082
Evans, Georgia
#13
If you have a SWG your CYA should be 80ish. For a non-CYA pool we recommend 30-40, except in hot sunny Texas and AZ and places like that we often say go a bit higher, like 50. So its because of being in Texas you get a little more. Folks in New Jersey don't.

God bless Texas!! LOL
 

duraleigh

Admin
Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
31,327
Sebring, Florida
#14
Please read "The "ABC's of Pool Water Chemistry" up in Pool School. That's the place to start. It will also give you suggested ranges for the chemistry.