TETRATEC EX EXTERNAL FILTERS Easy-to-use external filters for more efficient aquarium filtration. External filters provide the ultimate in aquarium filtration. They are ideal for filtering larger or heavily stocked aquariums, and offer improved performance over traditional filter systems. TetraTec EX external filters are designed to be very easy to use and maintain, making them ideal for anyone wanting to improve the quality of their aquarium water. Filter start button makes starting filter easy Snap valve shuts off water flow for no-mess access to media Easy to set up and maintain Robust design Comes complete with media and pipework CE certified; TUV/GS tested - safety and reliability assured 3 year guarantee Application TetraTec EX filters come compelte with full operating instructions. Simply install the pipework and prepare the media as instructed. Then add a little aquarium water to the main cannister, attach the lid, and use the filter-start button to completely fill the unit. The EX filter sits outside the aquarium where it is easy to access and clean.