What is an Under-Gravel Aquarium Filter? An under-gravel filter is pretty much what the name implies, a filter beneath your aquarium gravel or substrate. It is made up of a perforated or slotted sheet of plastic, slightly raised above the base glass to allow water flow downward, through the gravel and up again through “uplift tubes”.
With the increasing popularity of planted tanks and aquascaping, a few people are asking questions about High Tech or Low Tech setups.
To know Mother Nature, is to love her smallest creations’ Takashi Amano I often hear people ask what the difference is between a Planted Tank and Aquascape. Although it may sound like a straightforward question and an easy one to answer, there is quite a bit more to it than that.