lucky you! your water tank is below ground. I have to look at my 20,000 litre tank outside my kitchen window. It sits on a concrete plinth so I can't even plant around it. I'm too terrified to grow creeping fig on it incase it affects the integrity of the tank. At the moment it has wisteria draping over it, looks lovely in spring but deciduous and it's now becoming too invasive so need to get rid of it.. I also have star jasmine approaching from an arch beside - can't wait for it to take over the tank.. I love all the decorative features suggested but I reckon something like star jasmine might work with some other landscaping features to the side: bench, rock, more plants. The beauty of star jasmine is that it doesn't root, will drape over and can be pulled aside. Every couple of years I put the blower over the top of my water tank it to make sure the leaves don't mulch to create soil on top.

Photo?

Thank you Monty. The tiles I have are actually across multiple areas aside from the kitchen, so am erring on not going with another set. Additionally the current tiles are the right style for the house and kitchen options I'm going with. A conundrum, but will continue scouring the options. Cheers

The best house I have owned I designed myself. (That's not to say it was perfect...when you design it yourself the mistakes can annoy you) This link explains how I went about it House Design