I've got the same exact tank. I've been trying to find someone that has shrimp in theirs and see if I can do it as well! What plants do you have in there? Idk if the little led light would support some or not. Like you said just a plain tank would be boring. I've got a 10 gallon with shrimp that's doing well and wanted to drop a few in the small tank since its not getting any use. Ill have to try your method!