I was looking at wall aquariums and found one with dims of 5' x 1.57' x 6", it holds 18 gal with dual power head filters and a single heater. It has two ballasts, and two flourescent bulbs. What should I stock it with, I would prefer something on the smaller side that can live in it for a while maybe some, sholing fish like tetras, bettas, or loaches. Looking for a nice comfortable mix. Let me know what you think.