03-06-2013, 11:44 PM
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Originally Posted by MoneyMitch
there are people that will use bubblers when lights are off to gas off leftover co2 from injhection. unless you are using co2 injection there is no benifit from them and no harm either, they are for looks. but if you have a non co2 tank dont use a bubbler as you want to keep in as much co2 from the fish as possib even at night so that there is a nice buildup for the plants to start out with the next day.
In certain tanks, there is definitely a benefit to using an air pump. In addition to aiding in the gas exchange in tanks with minimal surface disturbance, air pumps also circulate water. So, a well placed bubbler can eliminate dead spots in a tank, where a powerhead or second filter would be too much. Dead spots are common in HOB filtered tanks - circulation is not one of their strong points.