UNDERTOW - The Best Traditional Undergravel Filter on the Market! In sizes to fit all standard aquariums. Filt-A-Carb carbon cartridges (enclosed FREE) remove harmful gases, odors and discoloration. Fishguard prevents fish from entering lift tubes. Collar caps cover lift tube collars when not in use. Gravel guard prevents gravel and fish from getting under filter plates. High pore air diffusers increase bubble flow. High collars offer secure grip onto one inch diameter lift tubes plus easy access for powerheads. Even filtration draws water through entire gravel bed.

#UT30 - 30/34 Gallon 12"x 36"  $27.99 #UT55 - 55 Gallon 18"x 36"  $36.99  #UT70 - 70 Gallon 18"x 48"  $53.99