Once I get my tank for water storage i was thinking of taking it to the local shop in town to have it steam cleaned if it's not going to cost too much. Has anyone had this done? I've read a few posts about pressure washing them but a pressure washer i do not have nor do i have water in my shop yet and it is now winter. I fear bad things if I try to do it outside. The temps today were below zero F. What if i just flush it a bit once its in place and put a filter on it and pump the bejesus out of it for a day or two???