White Cloud Mountain Minnows ( Tanichthys albonubes) They are cold-water fish and among the hardiest nano fish in the fishkeeping hobby. You can even skip the heater when setting up your nano aquarium. You can safely keep a pair of white cloud minnows in a 3-gallon tank. How many Least Killifish can you keep in a 3-gallon tank? They do best in heavily planted set-ups, and you can expect them to be peaceful inhabitants when kept in pairs. How many Harlequin Rasboras can you keep in a 3-gallon tank?Īlso known as dwarf livebearers, least killifish are among the lowest-maintenance nano fish. Harlequin Rasbora ( Trigonostigma heteromorpha) They should be kept in groups of at least 2 individuals, but they can easily share a 3-gallon tank with some invertebrates. Harlequin rasboras have a mesmerizing metallic coloration that you’ll have a hard time looking away from! How many Pea Puffers can you keep in a 3-gallon tank? Pea Pufferfish ( Carinotetraodon travancoricus) These tiny & feisty carnivores prefer a solitary existence. Keeping just one dwarf pufferfish is ideal, as they’re not social critters. Pea puffers are small enough to fit 2-3 of them in a 3-gallon tank, but their temperament makes that a bad idea. How many Neon Tetras can you keep in a 3-gallon tank? Neon tetras are eye-candy, contrasting the lush-green background of a planted 3-gallon tank! Tetras are generally considered schooling fish, but they can feel safe traveling in groups of 3. How many Endler’s Livebearers can you keep in a 3-gallon tank? They animate a nano tank even in small groups of 3 and are easy to care for. The population can grow quickly because they’re prolific breeders. How many Betta Fish can you keep in a 3-gallon tank?Įndler’s livebearers are best kept in groups with a 1:2 male to female ratio. Male bettas are territorial fish that can easily keep themselves entertained in a planted nano tank. Here’s a list of the 11 best fish and invertebrates to keep in a 3-gallon tank: Betta FishĪ 3-gallon tank is the smallest home you can get for a betta, although they much prefer a minimum of 5 gallons! They will animate your nano tank and can also act as a cleaning crew. Low bioload – critters that don’t create too much waste can be kept in larger numbers, like cherry shrimp and nerite snails.Territorial – because they like claiming their habitat as their own, keeping territorial nano-fish as a single-species in a 3-gallon tank is preferred.With a temperament that’s the direct opposite of that of shoaling/schooling fish, solitary species prefer living alone. Solitary – as they don’t feel the need to be surrounded by their peers.The best fish you can keep in a 3-gallon tank will typically display one, or all, of these 3 behavioral traits: Solitary fish, or a group of invertebrates with a smaller bioload, are easier to keep healthy and content in a 3-gallon tank. Water quality quickly drops dangerously low in an overstocked tank. They simply produce more waste than the culture of good bacteria can convert into non-toxic nitrates. Even a small 6-individual school of nano fish can overwhelm a 3-gallon tank’s biofiltration system. You also have to consider the fact that your nano tank’s capacity drops as you start adding gear into it.Ī filter, a heater, some décor, a live plant, even the substrate all take up space in this already limited environment.įishkeepers often end up overstocking nano tanks. This guideline does have its flaws, as it doesn’t take the behavior/temperament of fish into account. Going by the “1 inch of fish per gallon of water” rule, you can safely keep three 1-inch fish in a 3-gallon tank. How Often Should You Clean A 3-Gallon Fish Tank?įactors That Influence How Many Fish You Can Keep In A 3-Gallon Tank.What To Avoid When Setting Up A 3-Gallon Tank.Fish You Shouldn’t Keep In A 3-Gallon Tank.Popular Fish Combos To Stock A 3-Gallon Tank.Factors That Influence How Many Fish You Can Keep In A 3-Gallon Tank.
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