Podłoża granulowane H.E.L.P.

H.E.L.P. Advanced Soil is a manufacturer of various soils for freshwater aquariums H.E.L.P. is an acronym of "High quality Easy treatment Low Price"
I've filmed aquariums at their booth at InterZoo 2012 mostly because of these nice air-driven undergravel filters we see in each tank. In the first one there are even two uplift tubes. Still, probably too less for such a huge amount of neon tetras - but anyways, this tank was set up only for the show, not for permanent keeping all these fish inside.
Each tank has different substrate:
00:31 - the first tank has Advanced Soil, which keeps your pH and KH low over a long time. According to the manufacturer, it also helps to keep the water clean.
01:40 - this tank has Advanced Soil Shrimp, which is developed for shrimps. According to the manufacturer, it contains various nutrients needed for shrimps, and also helps to keep water conditions best for shrimps
02:01 - this tank has Advanced Soil Plants, rich in nutrients neccessary for plants

Strona producenta:
http://www.help-advancedsoil.biz/english/soil