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Loaches are mainly bottom-dwelling fish that can show varied behaviour depending on the species; many, like clown and zebra loaches, are active and playful especially in groups, foraging along the tank floor and helping keep it clean, while others, such as kuhli loaches, tend to be shy and hide in groups among decorations, becoming more active once acclimated and kept in appropriate numbers.
Loaches are generally suited for intermediate aquarists and are hardy when kept under proper conditions; they require stable, mature tanks with clean water free of ammonia or nitrites, good filtration, sufficient oxygen, species-appropriate water flow, a varied diet of sinking pellets and occasional live or frozen foods, and for social species, groups of at least five to reduce stress, making them manageable but not ideal for beginners.
Most loach species are tropical or subtropical and need stable water temperatures and parameters that are difficult to maintain in outdoor ponds, so they are generally not recommended for pond environments and are best suited to aquarium life.
The number of loaches required depends on the species, but social varieties like clown, zebra and yoyo loaches should ideally be kept in groups of five or more to promote natural behaviour and reduce stress, with tank size adjusted to accommodate the adult size of the species.
