Hey guys, I recently bought a Aquamaxx 9.6 gallon rimless tank https://www.marinedepot.com/AquaMaxx_Rectangular_Low_Iron_Rimless_Aquarium_9.6_Gallon_Nano_Cube_Aquariums_Tanks_Under_10_Gallons-AquaMaxx-UJ94566-FIAQNCNTUT-vi.html I bought the 16 inch Finnex Planted plus for this aquarium and its too small. Should I buy the 20 inch version? What light fixture size do I need for this aquarium? Its a similar aquarium to the ADA 45P and the UNS 45U. Thanks!