Hi All, The landlords at our place here in Adelaide finally removed the rusted-out water tank from the 6mx6m shed. I can now install something that actually works so I can collect the rainwater for the garden. Having no experience in this, I'm looking for some advice from all the experts out there We're starting with guttering intact connected to a single outlet at about 2m from the ground (currently open to drop the water to the ground). My initial thought is to use 2-3 IBCs in a stack with the water flowing from the shed into the bottom tank(s) with a solar-powered transfer pump to fill the top tank to provide enough pressure head to water the garden. Before I buy the bits, any suggestions or advice to make something work?