Probably, but it'd be expensive I assume if you needed magnets for that thick of glass. I just can't imagine spending 300 dollars on an algae magnet when I have a billion free bladder snails.Couldn’t you build one diy?
I have large magfloats for my 180g. They cost about $140 8 years ago .If you get your finger in between them you will be sorry. They store with a 3/4 inch piece of wood between them and are hard to pull apart.
I have found them to be very hard to drag across the glass. Very powerful magnets ..
I found that the dry side scuffed the acrylic a little. Since it would add up over time that was the first and last time I used the magnet.