well i have been thinking about dif ways to make a tank and came up with a hot tub. i figure i could use the existing plumbing to set op filtration but i was worried about the chems. i rathert not buy a new tub so is their a way i could clean a old one? my last real concern is that i wont be able to see them. anyways figured if i do it ill do at least an 8 man tub if not 12, any ideas welcom. thanks.