Can Harlequin rasbora Live With Neon tetra?

Detailed assessment

Both Harlequin rasbora and Neon tetra share a comfortable temperature range of 21–25°C (Harlequin rasbora prefers 21–28°C, Neon tetra prefers 21–25°C). Their pH ranges overlap well at 5–7, so water chemistry is compatible. Both species have low aggression scores (Harlequin rasbora: 1, Neon tetra: 1 out of 10), which supports peaceful cohabitation. Note: fish 2x+ larger may eat smaller tankmates With careful monitoring and adequate tank size these species can usually coexist, but be prepared to separate them if aggression or stress appears.