JULMELON Hot Tub Scum Absorber, 4 Pack Spa & Pool Scum Eliminating Balls Reusable Hot Tub Oil Absorbing Sponge Washable Scum Floating Filter to Keep Water Clear for Pool Bath Hot Tub Accessories(Gray)

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They arrived on time and looked great out of the box. I kept them in the hot tub but I can’t say they actually worked. I saw a bigger difference in regular tennis balls than I did these. I’d go with tennis balls instead.

I personally can't say I see a difference from prior to using these balls. Maybe a slight improvement, but still have to clean the edges off every day or two, of course, these make great scrubbies for cleaning the edges. They always end up in the filter, so, maybe that is what's reducing it's effectiveness?

Love the pool balls to remove the scum in the hot tub. I just got my first hot tub and wanted something to remove the yuk in there and these set of spa balls do a great job and are reuseable.

I got these to help keep down the dust, dirt, bugs that get in my stock tank pool. I live in the country so there is a lot of stuff floating and blowing in the air that gets into the pool. I was really surprised how well these balls do. You just throw them in and let them do their thing --- which is float around on the water gathering up all sorts of gunk. Every morning it seems that there is a lot of june bugs, dirt, etc on these balls. They are easy to clean -- I just knock the stuff off, sometimes I hose them off, and toss them back in the pool. You can also clean these balls if they get really bad. I think they have really helped keep my stock tank pool clean. I highly recommend them.