I'm a new pool owner (purchased house with existing pool, kids love it). I've got the water chemistry levels in range according to my local pool shops, but the pool needs 250 mL of acid every day to keep the pH in the recommended 7.4-7.6 range. Any suggestions on how to reduce the chemical consumption and maintenance effort would be appreciated.
I'm being told this amount of acid consumption is normal for some pools, and I'm aware that SWGs increase pH. However, given that salt water pools are apparently "low maintenance" it seems excessive that not adding acid every day will result in water that is not within limits. I'm also being told to increase TA to reduce the pH fluctuations.
I notice that what I'm being told does not match with the Water Balance for SWGs page. I've also been assuming that less CYA is better because it is toxic in higher concentrations.
Time to challenge all my assumptions and get some advice.
Cl: 4300 (SWG says 3750 is optimum)
Water temperature is 29 degC (it's been quite hot lately). The SWG is set to 30%.
Pool shop recommendation [TFP recommendations]:
FC: 2-4 [3-5]
pH: 7.2-7.6 [7.5-7.8]
TA: 100-140 [70-90]
CH: 150-400 
CYA: 30-70 [70-80]
Based on the TFP SWG recommendations I am contemplating:
Keep the pH under 7.8 rather than 7.6?
Reduce my TA from 130 to 90?
Increase the CYA from 35 to 70?
Increase the CH from 200 to 300?
Does that sound like the right approach?
Thanks for your help!