20L/29 Economy Undergravel Filter 12" x 30"(Lee's)
Trouble-free Biological Filter with flat-plate design. Filter plate has more open space which allows for better water circulation. Filter plates are made of a semi-flexible, break-resistant plastic. This under gravel filter uses the same uplift assembly as Lee'sŪ Original Under Gravel Filters.
All sizes are of single-plate design except for the 40/55-gallon (13130), which has 2 plates. Most economical of Lee'sŪ three under gravel filter styles, yet includes fish-saver elbow, Slim Discard-A-Stone, and Original Carbon Cartridge.