20 gallon lacking "wow factor"

[SeaHorse_Fanatic]

Yup, I would try reaquascaping and get away from the "rock wall" look. Maybe a couple of island. Then add a couple of colourful hardy corals, like bright green star polyps, some frogspawn/hammer/torch, maybe red open brain for the sand bed. I also use red macroalgaes in my tanks with no tangs to add a splash of colour (red halymenia & gracilaria) but these like regular dosing of iodine (Lugol's solution) to stay healthy I find.