You need at least a 3800 GPH pump I picked up a couple on Ebay a 2200 GPH pump and a 3800 GPH , but a good gas pump can be had at harbor freight also you should run some of your material through a good screen so you don't end up with a ton of sticks and weeds in your highbanker , I built my grizzly box so it screens out all of the bad material , just gravel runs through my highbanker , keep reading and learning you will figure it out and find what works best for you !! Good to see another miner here on the forum !!