Build a fish list and check tank dimensions, group sizes, and pair conflicts.
Freshwater planning for 8 reviewed fish. Each profile links to its care source; check the complete care needs before buying.
Tank lengths and heights, group suggestions, beginner classifications, narrowed ranges, and some volume thresholds are conservative editorial choices. Rasbora ranges center on the source’s targets. These are screening rules, not tolerance limits or a total stocking capacity. The larger aquarium directory includes fish without reviewed care data.
5+ gal · 16+ in long · 78–82°F · pH not reviewed · Check local stock water
Keep one betta. Community housing is temperament-dependent; use a larger planted tank. Gentle filtration.
Read the care source ↗10+ gal · 20+ in long · 76–78°F · pH 7–8 · Hard water
Plan for breeding. Mixed groups need two to three females per male; same-sex groups avoid most population growth.
Read the care source ↗10+ gal · 20+ in long · 70–82°F · pH 6.8–8.5 · Hard water
Three is a suggested social group, not a schooling requirement. In mixed groups, use at least two females per male and plan for fry.
Read the care source ↗20+ gal · 30+ in long · 65–75°F · pH 6–8 · Soft to hard water
Active schooling fish: use a long tank with open swimming room. Avoid slow, long-finned companions.
Read the care source ↗10+ gal · 20+ in long · 72–82°F · pH 5.5–7.5 · Soft to moderately hard water
Small shoaling fish. Keep six or more with gentle flow and tiny foods. The planner uses 10 gallons rather than the source’s smaller specialist setup.
Read the care source ↗10+ gal · 20+ in long · 74–78°F · pH 6.8–7.4 · Soft water
Keep a school of six or more. Planning ranges center on the source’s 76°F and pH 7.2 targets; they are not biological tolerance limits.
Read the care source ↗29+ gal · 30+ in long · 72–82°F · pH 6–8 · Check local stock water
Boisterous fin-nipper. Keep seven or more, preferably a larger group with space. Avoid long-finned or timid companions.
Read the care source ↗29+ gal · 30+ in long · 78–86°F · pH 6–8 · Soft to hard water
A single centerpiece fish is the planner’s starting point. Needs a tall tank (at least 18 inches here); territorial pairs and groups need separate planning. May eat small fish.
Read the care source ↗Add fish above to check your plan.
Unknown hardness and missing pH data need a separate check. Matching ranges do not guarantee compatibility. These tools do not assess disease, sex ratios, plants, filtration, or a tank’s biological maturity.