i don't if this the right section to post this, however we are planning to replace our vinyl liner this year. According to pool school the optimum levels for our swg pool is 70-80 CYA and target FC of 5-6. I am wondering what impact, if any this will have on the fading of the liner vs the FC=3 that my pool store recommends. I have seen my chem needs drop drastically since I started using tfp methods, but am I sacrificing the aesthetics and longevity of the liner?? Can it damage any equipment?