Here's my 55 gallon super-tall (5 ft) acrylic hexagon 'shrimp high-rise'. I currently don't have anything in it but flora and am waiting to restock. These are shots from about two years ago with some Cherries:
Some caveats to this tank:
-It's an absolute bitch to clean.
-You -have- to have an airstone to work as an 'elevator' for gas exchange. I forgot to turn it back on one day after a big clean and had a nasty die-off.
-Good luck culling anything. I had to make a shrimp trap out of a plastic bottle and go 'fishing' every day. Actually, that was kind of fun.
Here's my sad 45 gallon breeding colony tank. Had a timer malfunction a month and a half back...and hair algae out the @ss is the result of 240 straight hours of solid dual T5 HO nightmare fuel. Still battling this HUGE problem...have a 5 gallon bucket absolutely stuffed with plants in a liquid carbon/peroxide bath. Here's my "before" will post my rescape this weekend after completion!