mistergreen

I got tired of my spray bar suction cup coming loose so I got these mag clips. It works!

If you want to hold something heavy, you might want multiples.

https://zoomed.com/magclip-magnet-suction-cups/

hoppycalif

Some years ago I had a bunch of strong, coated magnets that I tried to use in place of suction cups. They worked fine, but tended to rust even with a rubber coating on them. I had coated the magnets myself, which wasn't a good idea.

mistergreen

I think epoxy coating would be better. I was thinking of doing it myself but the cost of buying epoxy and magnets doesn't have any benefits.

Michael

This is the kind of attachment hardware that Koralia uses on its powerheads, and it is excellent!