air pump ntf tank?

hiya lads i been growing now using a nft grow tank and was wondering if i should get an airpump to go in the res to oxegenate (spelt wrong im sure ) the water thats in there?
any suggestions lads are they really worth it?

daz

*bumpybumpy*

no need, the water recirculates which adds oxygen when the water gets dumped back into the res. Also there is never a long period of standing water, so you are good with one. Save some money there

ah thanks mate
daz