Floating magnet cleaner with removable and replaceable S/Steel scraper for Fresh or Saltwater glass aquariums. 2 in 1 magnet cleaner that scrubs away algae and scrapes away stubborn marine coralline algae. The original floating magnet cleaner design features easy retrieval when magnets become separated. Dimensions (L x W x H mm): 84 x 60 x 24mm (Excluding Scraper) Suits GLASS thickness up to: 16mm Note: Although the scraper is made from 316L stainless steel we recommend that you remove it from the aquarium after use and rinse under freshwater and dry off. 316L stainless steel has good anti corrosion properties but if left in the high Chloride ion (Cl-) and Bromide ion (Br-) environment of seawater it will eventually corrode. When storing your Mag-Float or Mag-Float Scrape place the supplied plastic spacer between the magnet halves. Lets you easily and smoothly remove algae and scrap off dirt from aquarium surfaces Cleaning without knocking over decorations or damaging corals and invertebrates Your hands stay dry while algae are scrapped off Removes algae quicker than other tools Does not scratch aquarium tank surface Removes a massive amount of algae and dirt in one swipe Strong neodymium magnets ensures the Mag-Float cleans reliably without separating apart Magnets with lifetime durability that remains strong over time Designed for freshwater and saltwater tanks Will not rust. Mag-Float can be left attached to your aquarium surface at all times. Made of toxic-free material, safe for fishes Use regularly and your fish tank surfaces will remain clear and transparent