Question about cya

My mother in law recently purchased an Intex SWG for her pool. I've been trying to follow the TFP method, as well as encouraging her to as well. My question about the cya is this... TFP recommends 70-80 ppm cya I believe, but the owners manual recommends 30 ppm. Should I just say to heck with the owners manual? What's the reasoning for running cya higher with SWG? I would think it would allow for decreased SWG run time and therefore longer cell life... What's your thoughts?

Sent from my SM-G935V using Tapatalk