A Defense of Undergravel Filters
17:24
Secretly the BEST Filter? Why the Under Gravel Filter rocks!
26:23
Air Driven Filters - how placement matters for sponges, under gravel filters and more.
21:39
3D printing a Koeningsegg Gemera Model Kit
39:02
Undergravel Filter Good or Bad? - Fish Room Update Ep. 50
56:10
Why We Broke Up With Under Gravel Filters
1:15:16
Part 8: Understanding How A Plenum Works and Why it works So well :Kevin Novak Ph.D.
27:14
Understanding the differences between a Plenum and an under-gravel filter.
23:54