Satan's Goldfish;4277250; said:Hey steve, (and don't mean to hijack Mike!) My pond when full was about 4 metric tonnes of water + the weight of build materials, and according to the previous owners the concrete foundations of the conservatory were 18" thick and that's held up fine.
Any news Mike?
steve, the concrete is about a foot deep mate, nothing special, more is better i guess though

news..........well............not really

i am planning on lining it out completely with a thin ply, 5mm or something like that, then getting it properly fibre glassed, won't f*!@ing leak then hey

apart from that nothing to report, but i won't give up on it.