I do not know if this is appropriate to post, but a Fish Hatchery in Lima, OH is selling live fish and the PVC Ribbon Bio-Fill Material on ebay for really low prices. The PVC Ribbon would give one an SSA of about 1800 square feet in a 55 gallon drum. And, this stuff works pretty well in water applications >65F. The water needs to supply the O2 as with any submerged bio-filter, and as with any bio-filter, one needs a decent solids filter in front.
Search "Aquaculture".
This stuff will work much better than deer netting, and seriously cut your electric costs.
