Good idea, but I’d also suggest getting an acrylic magnet sleeve from Champion Lighting… it cleans the acrylic better, and basically keeps sand grains from scratching!..,I keep my mag cleaner about 1” above sand bed and use a Kent scraper to get that.
Been using them for probably 20 years.
As an added precaution, I remove the magnets from the tank whenever friends, especially with kids are visiting! Magnets are the first thing they want to touch!