There are many types of hillstream loaches that live in similar environments, but let’s specifically discuss the reticulated hillstream loach (also known as the tiger hillstream loach or gold ring butterfly sucker) because it is one of the most common varieties available in the aquarium hobby. This 2.5-inch (6.4 cm) oddball fish looks like a miniature stingray because of its streamlined shape, flat underside, and horizontal fins that can tightly grip onto any smooth surface. Plus, its unusual body is covered with light-colored spots and dark brown striping patterns. During the daytime, you can often find them climbing on the glass in a side-to-side crawl or fluttering their fins on the ground while searching for food.
Originally found in tropical regions of Vietnam, Laos, and Cambodia, hillstream loaches live in shallow riffles, river rapids, and slower-moving stream pools in between. Their native habitat tends to have lots of rocks and is sparser in vegetation. Because heavy rainfall can stir up sediment and cause fluctuating water parameters, they are quite hardy and can handle a wide range of environmental conditions.
our opinion, what they really appreciate is a stable pH (preferably from 7.0-7.8) and good water quality. Any kind of fish tank filter will work, as long as it’s appropriately sized for your aquarium and the other inhabitants can handle the flow. A range of 65-80°F (20-27°C) is acceptable, but at higher temperatures, they may be more susceptible to stress and illnesses. Also, keep a tight lid on the aquarium since they have the ability to climb up glass walls and escape. If your hillstream loach is missing, try looking in your filter because sometimes they like to crawl inside.
What fish can live with hillstream loaches? They get along with most peaceful community fish that are similarly sized and won’t fin nip them. We’ve kept them with goldfish, livebearers, shrimp, snails, tetras, danios, and other schooling fish with no problems.