Hello all, I currently have a 30l cold water / temperate tank in my kitchen with 8 minnows in it. After doing a lot of research I realised that 30l is far too small for any sort of fish. Its a Biorb flow which looks pretty but is incredibly hard to clean and the pump is extremely noisy. I'd like to upgrade to a bigger tank and was wondering what sort of size you guys recommend. Ideally with a quiet filter , easy to clean. I love goldfish but I know they get too big and are very messy. What other fish will get along with my minnows? Many thanks for your help.