Mag-Float Glass Magnet Cleaner - Small (up to 5mm) The original floating magnet cleaner suitable for Fresh or Saltwater glass aquariums. Easily cleans away nuisance algae without getting your hands wet Powerful neodymium magnets create a strong magnetic coupling between the two halves If the magnets become separated the cleaning magnet floats to the surface for easy retrieval Suits GLASS thickness up to 5mm Dimensions overall: 60 x 35 x 52 (L x W x H mm) Cleaning pads area: approx 60 x 30mm Note: When storing your Mag-Float or Mag-Float Scrape use the supplied plastic spacer between the magnet halves. Model Max Thickness Glass Tank Use Acrylic/Plastic Tank Use Nano 4mm No Yes Mini 3mm Yes Yes Small 5mm Yes No Long 10mm Yes No Large 16mm Yes No Extra Large 20-30mm Yes No Scraper Large 16mm Yes No Scraper Large Plus 20mm Yes No