For sale is a 50 gallon SeaClear System II acrylic aqurium and stand. It was set up as a saltwater aquarium but can be used for freshwater fish as well. 

The back of the tank has a built in sump that houses all of the pumps and has special compartments for filter media. It makes for a very sleak setup. 

The tank does have minor scratches from the sand and decorations but they can be buffed out since it is acrylic. 

The tank sells for $650 and the stand sells for $120. I'm looking to get $300 obo for both.