I have 2 - 20 x 20 pad filters for sale. We've outgrown them and they need to go. As we were growing, I would use them in series for rough then final filtering. Both have 1/2hp pumps.
Filter # 1 220v - $1300
30 plates - white plates (Polypropylene?)
Crossover plate and ends for double filtration (splitting the filter)
Filter # 2 - 110v - $1100
36 plates - Black plates (Noryl?)