When a 23,000 litre (5,000 gallon) water tank starts to rust you end up with a big object to dispose of. It is heavy, it is awkward to handle, it is a dead weight that is always in the way.
We mulled over what to do with ours for a long time before inspiration struck. Vegetable gardens, just like those over-priced ones you see in the gardening centre!
We had a cute idea with concentric circles of garden beds which sounded exciting until we realised that any attempt to bend corrugated iron wouldn't work and would be a waste of time.
I have to acknowledge that my wife had the idea we finally went with: to cut the tank into sections and rejoin them.
This is how we turned our old water tank into 6 boat shaped vegetable garden beds.
Step 1: Dismantling the tank - remove the top
The obvious first step was to dismantle the old tank. Sounds easy but these things are strong. They are designed to hold 23 tonnes of water without leaking. So there are lots of screws and loads of glue.
This tank was about 1.8m tall, 3 metres in diameter and built from 3 rows of corrugated iron. There was a lid on the top and a obviously a bottom that needed to be removed. These were soldered or welded to the sides. I bought a pack of 10 grinder cutting wheels since I knew they were going to get chewed up.
We got off to a bad start. I removed the entire top row with the lid attached, with the idea of pushing it off and then cutting it apart. This was the point where I realised they are big and heavy and awkward and it ended up stuck and twisted and wonky.
In retrospect I would have worked my way around the top cutting off the lid and letting it fall down inside, then removing the top row of iron.