I have been looking into getting a swg for the pool,and my lps guy always tells me that its too hard on equipment and i only spend 50.00-60.00 on chlorine a summer so he wouldnt suggest installing one on my pool,and when i ask him why he says "it eats the pool sides and rails away and has seen lots of damage they can cause" so i always wimp out is there any truth to this statement? i finally got to open my pool yesterday!!