# Thread: first test with TF100

1. ## first test with TF100

New to this testing thing here is my results what do I need to add to get the cya up?

fc 0
ph 7.2
ta 80
ch 120
cya does not register on test
pol temp 70

2. ## Re: first test with TF100

CYA is really cyanuric acid, which is often sold as either conditioner or stabilizer. Look for 95+% cyanuric acid on the label. It is sold mostly by pool stores, in the pool section of many big box stores like WalMart, Target, Home Depot, and Lowes, and on the Internet.

3. ## Re: first test with TF100

Okay thanks how much cyanuric acid should I buy I think my pool is around 40,000 gallons dont know how to figure it out.

My pool is 18-41-16-28 true L deep end is 8 or 9 feet I think its 9 because we have a didving board..

4. ## Re: first test with TF100

You can use the Pool Calculator, see the link in my signature, to help you figure out the answers to these questions. Divide the pool into two rectangles, calculate their volume separately and then add them together. Then use the CYA section to see how much CYA you need for a pool of that volume to raise CYA from 0 to 40.

5. ## Re: first test with TF100

got it hopefuly I did it correct pool is 31000

166 oz stabilizer
91 oz borax
146 oz baking soda

6. ## Re: first test with TF100

Originally Posted by twinsticks
got it hopefuly I did it correct pool is 31000

166 oz stabilizer
91 oz borax
146 oz baking soda
Yes, 166 oz of CYA should get your CYA to about 40, assuming the 31K.

You do not need to add borax or baking soda. Your pH an and TA are fine where they are.

You do, however, need chlorine! You have zero FC and no CYA. Add enough bleach/liquid chlorine to maintain 2ppm FC until you get some CYA in there.
Then adjust FC accordingly. See the Chlorine/CYA chart in my sig and in Pool School.

7. ## Re: first test with TF100

Made a mistake pool is 37000 gallons

8. ## Re: first test with TF100

You can use bleach to help calculate your gallons. One gallon of bleach will raise 10,000 gallons of water approximately the percentage of the bleach in FC (i.e, one gallon of 6% ultra bleach will raise 10,000 gallons approx. 6 ppm FC).

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