I use a two tanks for different bait. Both are 125 gallon cattle buckets. I pump with a cheap fountain pump, the water to a tubberware storage box and a top spray bar. I use pvc tubing and a ball valve to adjust presure. In the storage box I have three layers of filters. That foam like stuff on top, then a bag of charcoil (use a dollar store stocking wash bag) then I have some air filter padding under it. Cut a hole for the water to drain and place on two boards on top of tank.
Cost:
Tank: 75 bucks
Pump: 38 bucks
PVC supplies: 28 bucks
Filter supplies; 24 bucks
Bag for delicates: 1 buck
Tubberware storage box; 12 bucks

Total 178.00

Capt Mike