I have a practically brand new PP-4 for sale. I purchased two of them and found that was too much flow for me so downgraded to just one. Still have the original packaging. Asking $35 and pickup in Centennial near Smoky Hill and Picadilly. The only trades I'd be looking for are maxi minis.
This is comes with a controller and is adjustable from 100-1000gph with constant, sine, or random flow patterns.
This is comes with a controller and is adjustable from 100-1000gph with constant, sine, or random flow patterns.