looks good if you manage to keep it stable, keep in mind you really only have like half a gallon of water in there whenever you do something that needs water measurements. (minus volume from substrate, wood, rocks and empty space on top.)
Only thing I would do is add a lid to prevent evaporation. Small tanks like this are vulnerable to swings and evaporation doesn’t help since the water will disappear quickly.
Miceandbeans 
looks good if you manage to keep it stable, keep in mind you really only have like half a gallon of water in there whenever you do something that needs water measurements. (minus volume from substrate, wood, rocks and empty space on top.)
Only thing I would do is add a lid to prevent evaporation. Small tanks like this are vulnerable to swings and evaporation doesn’t help since the water will disappear quickly.