Air stone & rocks

Hi guys,

I've set up my new tank last night with the silca sand. (Moving from gravel to sand), I've put in a fair amount of sand so that I can plant plants, and get a "landscaped" effect my creating hills ets.

If I put the airstone too deep under the sand, the air seems to spread out under the sand and come up further away from where the stone is, which is a nice effect, BUT it makes the air pump sound like it's working hectic overtime.

Where do you guys have your airstones placed in relation to the substrate? Should I get a bigger airpump?

Secondly, does anyone know where I can get reasonably priced aquarium rocks in the Roodepoort area? Last place I bought was priced at R14.00 p/kg. (Dunno if that's normal or overcharged)... but I know I need a LOOOT more rocks for my tank!

 

Hey Zoom - Take the road out to hartebeespoort from roodepoort (The one that goes past hillfox) about 2km past the cheesemouse the road takes a sharp right while going uphill. Just after the sharp right keep your eyes out on the left hand side of the road - There is sh*tloads of Pelindaba rock in the area.... If you get some keep about 500kg for me when I come up next week, Ill see if Onetime will let me take it home as hand baggage