Originally Posted by BBradbury
I'll take a shot at your question. Airstones are mainly for show. The tiny bubbles have no surface area, so when they rise to the top, they make tiny waves that really don't do much to mix oxygen into the tank water and allow carbon dioxide to escape (gas exchange). Even a lot of tiny bubbles don't do much. It would be better to remove the airstone and place the end of the plastic tube at the bottom. The much larger bubbles will move the surface water and create the surface movement you want.
You don't need the airstone. A good power filter with a gallon per hour rating (gph
) of 4 to 6 times the volume of your tank in gallons is all you need. Add large, weekly water changes to the mix and your fish and plants will be healthy.
I agree with BBradbury. I believe they are purely cosmetic in your main tank but are used in fry tanks and hospital tanks. It's completely personal imo
, some people love them, some hate them. It's the pump that does my head in!!