Kuhli Loach - Indestructible Tropical Aquarium Fish

Looking for an unusual little fish for your tropical fish tank? The Kuhli Loach might be just what you're looking for!

When setting up a tropical fishtank, it's always a good idea to get a few different varieties of fish.

The first fish I bought for my small tropical fishtank were Neon Tetras. While they make a beautiful addition to a fishtank, I soon noticed that they didn't like to eat flake food once it had sank to the bottom of the tank.
After a few days I found that the accumulating uneaten food was starting to go mouldy and I was worried that this would lead to all sorts of fish diseases and the like.

I realised I needed a sort of vaccuum cleaner fish that would hoover up all the uneaten food at the bottom of the tank. Although catfish are commonly bought for this task, I was intrigued by the curious snake-like Kuhli Loaches on offer at my local fish shop. I bought two of them and they seemed to settle in well, so I got another two as they seemed to like company - in the fish shop they were all huddled in a massive heap. A single Kuhli would get lonely, so always ensure your Kuhli Loach has company.

I soon found out that Kuhli Loaches (Pangio kuhlii) will happily eat any flake food left at the bottom of the tank. They also like bloodworms and just about anything else I feed to my tropical fish. They also spend a lot of time probing around the gravel for things. Occasionally they also climb up the live plants I have growing in the tank. Since I got them, the bottom of the tank has looked very clean.

Kuhli Loaches are peaceful fish. They live at the bottom of the fishtank and do not bother other fish. They do not like sudden noises or vibration - accidentally slamming a cupboard door for instance
causes them to race around the bottom of the tank in blind panic. They are largely nocturnal, but will come out to investigate if food is added to the tank.

Kuhli Loaches are sometimes called Coolie Loaches. Their size and appearance (colouration and markings) can vary significantly, so it is easy to tell each one apart. It is not easy to distinguish between males and females though. Most Kuhli Loaches are dark brown with yellow stripes, but there is also an all black version, the Black Kuhli Loach. Kuhli Loaches grow to a maximum length of 10cm, so they make ideal fish for smaller fish tanks.

If you have other fish then it is a good idea to provide a hiding place for the loaches.

Good tank mates for Kuhli's include tetras, barbs, guppies and platies.

Kuhli Loaches will sometimes spend a long time swimming in circles up and down around the edge of the tank. This is more common in newly set up fish tanks. Why they exhibit this behaviour is a mystery.

I can recommend adding a sandy area to the bottom of the fish tank. Kuhlis seem to like this as they sometimes burrow in it, ingesting the sand then squirting it out through their side gills. They are presumably able to filter out the food particles from the sand. It is very entertaining to watch!

Kuhlis are very fast swimmers, and catching them in a net is not easy. When catching all types of loaches care must be taken that the barbels in front of their eyes don't get damaged by the net.

Kuhli Loaches are egg laying fish, but it is unlikely that they would be able to breed in a fish tank.

Kuhli Loaches are very long lived - other aquarium owners have reported them as having reached over 10 years in age. I've had mine for over five years now, and they have survived many house moves, a few fish disease outbreaks, and even a couple of disasters when I went away on vacation. I believe they are indestructible fish.