Wouldn't this divided tank require almost three times the work of one tank? Each section would have to be cleaned, pruned, replanted, vacuumed, etc. and the water in each section changed. It could look really good and allow you to keep incompatible fish seemingly together. But, would the fish keep swimming into the divider, unless it were allowed to be a bit dirty? And, to properly circulate the water you would need three powerheads or filters, with three sets of hoses, three CO2 connections, etc. So basically it would be three individual tanks sitting side by side.