Compatibility Report
GuideMyTank compatibility analysis for German Blue Ram and Harlequin Rasbora.
Planning verdict
cautionOnly plan this pair if every listed condition can be met, and have a separation plan if stress or aggression appears.
No automatic safety blocker was found.
German Blue Ram and Harlequin Rasbora receive a conditional verdict from the current structured assessment. German Blue Ram is recorded as peaceful with an aggression level of 3/10; Harlequin Rasbora is recorded as peaceful with an aggression level of 1/10. The recommendation is based on the combined water, space, behavior, grouping, and predation checks below rather than on species names alone.
German Blue Ram has a recorded temperature range of 78–86°F and pH range of 5.2–6.8. Harlequin Rasbora is recorded at 73–82°F and pH 6–7.5. Their shared planning window is 78–82°F for temperature and 6–6.8 for pH. A shared aquarium must stay inside the overlap rather than merely touching each species’ outer tolerance.
German Blue Ram sets the larger listed base aquarium requirement at 20 gallons; the other listed minimum is 20 gallons. German Blue Ram is the larger adult by the recorded maximum, reaching 3 inches, compared with 2 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.
German Blue Ram is a moderate species associated with the bottom zone and moderate flow. Harlequin Rasbora is active, uses the mid zone, and has a moderate flow preference. German Blue Ram should be planned as a group of at least 2, while harlequin rasbora should be planned as a group of at least 8. The aquarium must support both social structures without forcing either species into insufficient space.
German Blue Ram is recorded as a omnivore with advanced care, while Harlequin Rasbora is a omnivore with easy care. Their listed preferred tank styles are blackwater and blackwater. Feeding access, cover, open swimming room, filtration, and observation should be planned around the more demanding requirement rather than averaged between the two species.
Use these pair-specific boundaries before treating the verdict as an acceptable stocking plan.
Only plan this pair if every listed condition can be met, and have a separation plan if stress or aggression appears.
These references support the underlying species records used by this assessment. They do not necessarily evaluate this exact pair together.
Continue with the most relevant care and compatibility resources for German Blue Ram and Harlequin Rasbora.