A healthy tank needs water movement at the surface, so oxygen can be mixed with the water and to allow carbon dioxide to escape. This process is called "gas exchange".
To get to a healthy level of gas exhange, your tank needs a filter with a gallon per hour (gph) rating of a minimum of 6 times the volume of the tank in gallons. So, if you have a 30 gallon tank, your filter needs a gph rating of 180.
The movement of water through the filtration equipment will sufficiently aerate the tank. Nothing else is needed.
"Fear not my child, just change the tank water."