The fish tanks are almost ready, but what it brought back were ideas from opensource technology – release fast release often & test test test.
The story continues, after the initial construction of the structure, a base of sand was added to provide a smooth foundation on top of which was overlaid a 1000 gauge black plastic sheet to provide a cushion against stone damage to the water holding clear plastic sheeting. The sheeting is sold in rolls of 5′ x 150m, so 5 sheets had to be joined side by side to provide a 25′ width sheet to go across the tank, having 4 joints. Once the sheet was placed in the tank, we started pumping water into the sheeting, patching leaks as they were identified. It was a very tedious and slow process involving alot of manual labor.
Once that was done, the tank was filled to a height of 5′, it will never hold that much water, but it provided a stress or load testing opportunity which showed that some of the corner poles needed to be reinforced.
One that was done, all is well and the tank is holding on until the fish are to arrive ….