Awe I feel all warm and cuddly with the lovely welcome. Thanks guys. Makes me feel like a part of something (my family think I’m nuts BTW..... only my youngest has an interest but even with her my intended set up doesn’t have her approval..... and my eldest tells me she’s not living in the sea life centre (but I’m already planning my second tank ..... up the middle of my 3 storey circular stairwell that runs in the middle of my house and is en route to the sump in the garage). Have to work out the engineering the tanks would sit atop each other and cascade. Only have a 1000 x 500 odd foot print to play with there.