Which way is right on Chlorine?

[jbop65]

I've worked with two different pool cleaning companies and it always seems one company said you were trained wrong.

Let me explain. Pool company A says they want to see you adding 2.5 gallons of chlorine to a pool if the chlorine level is below 5 ppm they also say if you go back the following week to service pool and you get a zero chlorine level and all other readings are good your not doing something right. pool company A also wants to see your CYA Level around 80

Company B says 2.5 gallons of chlorine is way to much for the pool and on a 13,000-15,000 gallon pool 1 gallon of chlorine is perfect and a tab in the floater. they also said that if you go back the following week yes you should be getting a 0 reading on chlorine it means it did its job. they also said they never want the CYA levels in a pool to be more then 40 or the chlorine wont do its job.

So A says more chlorine higher CYA
B says less chlorine add tab to floater....tabs have stabilizer in them so it would raise my CYA Level right?
So which company is right?
I tend to be on safer side so I don't have pools with Alage growth
Adding acid lowers PH does it affect Chlorine and Alkinlinity levels?

Thanks for the input.

[Denniswiseman]

Welcome jbop65
Higher CYA is definately out as it makes your chlorine ineffective
For every 10 ppm Free Chlorine (FC) added by Trichlor, it also increases Cyanuric Acid (CYA) by 6 ppm.
For every 10 ppm FC added by Dichlor, it also increases CYA by 9 ppm.
For every 10 ppm FC added by Cal-Hypo, it also increases Calcium Hardness (CH) by at least 7 ppm
Are you going to maintain the pool yourself. If so get a decent FAS/DPD test kit and don't put a weeks worth of chlorine in
Are your gallons US or UK? you can use Pool Maths to work out how much to use

[Teapot]

As Dennis said and I second, get a decent tester and own your pool. That way with help on here you can get rid of both A & B pool companies. Both are guiding you wrongly.
You might run with CYA levels of 60-70 if you had a salt chlorine generator or if you are located in the desert.
You want to be adding less chlorine in each dose but more frequently. Is this something you feel you could do un-aided? Once of course you buy a decent tester and not dip strips