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Not for use on acrylic aquariums
sodium is not a contributing cation to GH levels
making it safe for aquatic reptiles and amphibians
Iron is of no importance in fish only aquaria
it is just fine to start with a partial dose and build up to the full dose over several days
sera Glass Clear Large Magnetic Glass Cleaner Seachem Scraper Replacement Cartridge Not for use on acrylicThese magnets make cleaning the aquarium glass easy. The cleaning surface of the inner part removes the algae layers. The surface of the outer magnet is covered with a particularly fine synthetic mat that protects the glass. The magnets have an oar that allows attaching a piece of string for retrieving it. FOR USE WITH GLASS AQUARIUMS ONLY. SIZE: Large 60 x 110 mm (2. 4 x 4. 4 in.) for glass thickness up to 10 12 mm (0. 4 0. 5 in.)