I use the floating ones (wet side) that look like wood (dry side). Piranha, Hammerhead, Great White - each one is rated for a specific glass thickness. If you want to use the Magic Eraser pad, cut it very thin with a knife or razor blade and insert that 1/8" to 1/4" thick piece of white pad between the glass and the wetside.
That is the day to day cleaner. Once a week, I'll hit everything with a credit card. Once every two months, I have a Mag Float with a scraper that holds a brand new razor blade to work all the corners and along the sand. I'm very very careful, and as soon as I'm done I pull it out rinse off the razor blade, rub it down with cooking oil and wrap it up until next time. I only use the razor blade once or twice, and replace it with a new one thereafter. I got it from Fish2omorow. Avoid relying on metal scrapers in your Starphire glass tank, and take your time, checking the pad frequently to make sure nothing is trapped. Sand, bits of coral, snails, asterinas... make sure that velcro is clear of anything foreign matter.