http://www.amazon.com/Wide-Lip-Bucket-Basket-Container/dp/B0049XIIGC/ref=sr_1_1?ie=UTF8&qid=1412111826&sr=8-1&keywords=net+pot+lids
and some 5 gal buckets..
more airstones for hat 30 gal rezz..you can actually "overwater" in DWC by not supplying the roots enough O2 (I just did it in a 30g tote...