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Tetratec GC Gravel Cleaner is an easy-to-use substrate cleaner for aquariums. Well designed with an automatic start so no need to suck water up pipe a strainer to prevent large particles blocking pipe & to protect fish a triangular suction pipe for accessing corners & other awkward areas & a water flow regulator on larger models. Tetra Application Guidance: To start the siphon simply hang the siphon pipe into a bucket & plunge the Tetra Tec GC up & down until a flow of water starts. Then dig the suction pipe into the gravel & lift it up again to pull dirt from it. When replacing any water that has been removed from the aquarium remember to use Aqua Safe to make it safe. Tetra Technical Notes:GC30 Junior
- suitable for tanks up to 60 litres GC40 Standard
- suitable for tanks up to 200 litres GC50 Deluxe
- suitable for tanks up to 400 litres.