I didnt realise you needed a tank THAT big for goldfish!!! Im sure you hear that a lot on here, provided my estimates of the tank are right then, a quick google calculation: 35 US gallons = 132.489412 litres tell me I need a tank roughly ten times the size of the one I have now!!! What kind of fish would be suitable for a tank as small as mine? I'll have the proper measurements for you tommorrow. Thanks again