I have an older Hayward 900 series cartridge filter. I was recently working in the pool pump area updating some plumbing and I noticed that I get very itchy and irritated after brushing my arms up against the filter housing. It feels like it would if you crawl around in fiberglass insulation. slightly itchy and little spots of irritation. It slowly moves awary from the area of contact and into various other areas. Definitely a fiberglass feel. So far this has lasted 3 weeks on and off. I remember this also occurring another time a few years ago when handling the filter housing and it took forever to get the feeling to go away. So is the filter housing fiberglass reinforced? Does anyone else ever have this issue?