Hey everyone! I'm sure by now a lot of hobbyists have heard of the Poret foam filters for their tanks... We make a similar filter that we simply call the Hydrodynamic Mattenfilter. These filters are a 40ppi 2" thick black foam material that is made in the USA. We CNC cut each filter prior to shipping to make sure it fits your tank perfectly! The lift tube is a basic yet effective design and is included in the price on these filters! They are in use at many stores already as well as many breeders around the US. Check them out here! Buy Hydrodynamic Mattenfilters Now! Save 20%!!