I have an 8000litre plastic water tank I bought on ebay but don't need any more... it's about 7 foot diameter.. (a bit wider than a transit van)
I don't know what temp the plastic is good for, but it should be ok for hot tub temps, especially if we put some sand/support/whatever around the out side ?
only problem is, I won't have room to store it till next year... it's ok where it is for the next couple of months but then I'll need it shifted
I can borrow a trailer if we can relay it down to chug ?
even better, I could cut it down to size a bit first, so it's easier to transport ?
the top has a port hole thingie and a crack in it... but if it was fibreglass'd up it could always make two hot tubs
or... one hot tub and one storage tank, so the water could be pumped out overnight to keep it warm or whatever ?