Boesemani Rainbowfish: tank size, group & compatibility data

Stocking notes

Fast, active schooling fish that need a long aquarium and generous group size.

For planning, StockingLab models Boesemani Rainbowfish at its approximate adult size rather than the juvenile size commonly seen in shops. That matters because space use and waste production can change dramatically as fish mature.

What the calculator checks

• Whether the tank's usable volume is below the 180 L / 47.6 US gal reference minimum.
• Whether the selected group is below the planner's typical 6 fish social starting point.
• Whether target temperature and pH sit inside the planning range.
• Whether prospective tankmates create predation, fin-nipping, territorial or water-overlap conflicts.
• Whether too many fish accumulate in the same mid swim zone.

Before buying

Use this profile as a shortlist tool, not as a substitute for a dedicated care source. Confirm adult size, diet, sex ratio, habitat structure and locally relevant water conditions before purchase.

How to interpret this Boesemani Rainbowfish profile

At roughly 11 cm / 4.3 in adult length, Boesemani Rainbowfish should be planned at mature size rather than the smaller size commonly offered for sale. The reference tank is 180+ L / 47.6+ US gal, with a planning water window of 24–28°C and pH 7–8. A midpoint around 26.0°C and pH 7.5 is useful only as a comparison aid; the aim is stable water that overlaps the needs of the whole community.

The 6+ social starting point means tank size should be judged for the group, not for a single shop-sized fish. Its relative waste factor of 1.25× is on the higher side in the StockingLab model, so filtration margin and maintenance become especially important as the fish reach adult size. Activity is modeled at 1.45×, which makes horizontal swimming length and unobstructed space more important than litres alone.

Common planning mistakes to avoid

• Keep the group at or above the 6+ planning starting point before adding extra species.
• Treat the pH range of 7–8 as a compatibility window, not a target to force with rapid chemical changes.
• Prioritise tank length and open swimming room when comparing aquariums with similar volume.
• Check that the planned temperature sits inside the shared 24–28°C range for every species in the community.

Bottom line: the profile is designed to screen a proposed aquarium for obvious pressure points. A result that passes StockingLab still needs to be checked against current, species-specific husbandry information for Melanotaenia boesemani, especially diet, breeding behavior, sex ratio and habitat structure.