That filter would freak me out, lol. I don't really know what to make of it, I'm only about two months into owning a spa. I am starting to "somewhat question" the ahh some purges though. I bought the ahh some before we started using our tub on the recommendation of this site. Once I got the pump and controller sorted out (replaced), I filled the tub and purged it with ahh some. All seemed great, it made a ton of foam and got out some gunk, nothing crazy. Drained and filled the tub and installed new filter. Took a little getting used to with the chlorine additions and testing multiple times a day, but all was going fine. After about two months the water just wasn't as clear and I was having to clean the filter every week or so because it was clogging and not filtering unless the jets were on high. So at about two months in I decided to do another ahh some purge. I pulled the filter and rinsed it off as best as possible and put the remaining ahh some in the tub (used half the container on start up and used the other half this time. More than enough for my <300 gallon tub). I threw the filter in the tub and turned the jets on high and let it circulate. I did several cycles on high, they are set to run for ten or fifteen minutes. All together I let it run about an hour with the ahh some and the filter soaking. After finished I skimmed the foam off the top with my shop vac and drained the tub. I then cleaned the greasy ring that was left at the top of the tub with some Clorox cleanup and rags. Filled the tub back up, rinsed the filter, installed the filter, put in my chemicals and I was good to go. The only things I added were cya, baking soda and chlorine. All was great for a few days, the water had never looked better! But then I could tell that the filter was already clogged after less than a week! So I'm starting to wonder if it's really that great for filters??? The spa is not overused either, in the week in question my wife and daughter were only in one time. I go in two or three times a day for ten to fifteen minutes at a time. My chlorine is never low, if anything it's always a on the high side. And don't even get me started about the ahh some treatment I tried in washing machine, lol.