I think with the air stones it also depends on the size/strength of the air flow. Because my spray bar faces the back of the tank and is mostly submerged, I found that having my two air stones, on either end of the tank and buried in gravel, makes a lot of surface movement at the top for gas exchange

But I agree with Nossie, they aren't necessary equipment at all, I only got mine originally, because the little tank I had before was having problems cycling, so I wanted to give it all the help I could give it. But now in the larger tank I just like the bubbles because they're pretty

Well, I've never had a spray bar...dont know where to get them..or how to use them.

With the glass lid in the way, my spray bar can't really go anywhere  I find the air stones make up for it, so I'm not too worried

Caffuss what type of filter are you currently using? My spray bar -as Nossie has said- came with my external filter

Oh I'm going to get the Odyessa canester filter 500gph...for my 60 gallon..I will also have a power filter on it....would I really need a spray bar?