Hillstream Loaches need fast flowing, cool and well oxygenated water. However, they can not survive the winter in the UK outside so ponds are out of the question. Alot of them are quite colourful contary to your belief Oddball, Beaufortia kweichowensis, Gastromyzon and Sinogastromyzon are all well patterned fish some with good colour. They also need a well established tank with smooth large broad surfaces like stones of large leaved plants on these rocks mico orgainisms called aufwuchs grow which is what they mainly feed on.