The difference between an under-gravel filter and a Plenum also a dirt-magnet and a sponge-filter.
23:50
What really happened to the under-gravel filter? Why did it fall out of favor?
23:08
How to keep a 4-5 inch sand bed oxygenated with zero problems and/or work.
27:14
Understanding the differences between a Plenum and an under-gravel filter.
28:22
Adding Eheim substrate to the bottom of the Plenum and then filling the tank with its substrate.
17:24
Secretly the BEST Filter? Why the Under Gravel Filter rocks!
8:37
🌿Dirt Substrate vs Plenum Aquarium🐟 2 different tanks -Which one is Better?
25:03
A Defense of Undergravel Filters
18:08