Hi just wanna share my home made, low budget DWC, "floating raft system". My own design, but snatched a lot of ideas from this forum.
Cost of the system, is
Plywood, timber:300 usd
Pump, hoses: 200 Usd
plastic foam boards: 40 USD
Plastic: 30 usd
water container: 50 usd
Ford focus radiator...