Creating flow
 

Would one ever use airstones to create flow in a tank? Do airstones have any viable purpose?

I thought airstones were just used to add oxygen to tanks? I know I used them on small hospital tanks for my FW fish just because the tanks barely fit filters.

Although I did really like the look of an airstick in the tank before. :lol: :redface:

airstones are very useful in a FW tank they promote the exchange of co2 and oxygen in the water im pretty sure its co2 anyways the fish in FW seem to love it :changes:

flow
 

In a freshwater tank, air stones appear to be creating flow with the bubble stream they produce, but for true flow you will require a powerhead or filter jet...:biggrin:

or an AIRCOMPRESSOR hose running at 90 psi no powerhead has got anything on that, although i wouldnt do that if you truly value your fish

Don't use an airstone unless you want tons of salt creep.

Wait a minute you say an airstone can be used in marine as well?

I use airstones in my top off resivour to help maintain PH and keep the water fresh.

but wouldnt that introduce air bubbles to the tank??

They don't exactly create 'flow' but they do stir the water and create movement. My predicament is that i have a cylinder tank and nowhere to really install a powerhead. Are there any other disadvantages to having an airstone in a saltwater tank?