Just search Amazon... "aquarium pump"..."pond pump"... look for one atleast 1000+ Gph.. all depends on where to and from you are pumping water and distance... my 800 gph pump drains about 60 gallons in 10 minutes... but hasto travel 30 feet and a slight incline to bathtub... you'll want a high gph for a bigger tank so u dint spend an hour draining the tank lol.Do you have a link to the pump and all I would need to get it up and running?
Most places like home depot for example will sell flexible tubing $ per linear foot