Just do it the easiest way you can. Might be changing buckets. I had 10 gallon tubs that I could use the water pump from the dripsystem to pump out water but it's slow. I ended up going to a boat shop and getting a hand bilge pump. I put a hole just big enough in the top and I can pump it out in a minute. Working on a power pump to do it faster. Changing water is the heaviest part of it all. Good luck and let us know if you find a easy way.