Not recommended — a oscar and tiger barb are a risky mix.
Temperatures line up — both thrive around 74–79°F.
pH preferences overlap (6–8) — easy to keep both comfortable.
The oscar is aggressive and will likely harass or harm the tiger barb.
Plan on at least 55 gallons for the pair (the larger of their two minimums).
Can a oscar and tiger barb live together?
Not recommended — a oscar and tiger barb are a risky mix. Minimum tank for the pair is about 55 gallons.