Can Guppy Live With Common otocinclus?

Detailed assessment

Both Guppy and Common otocinclus share a comfortable temperature range of 20–25°C (Guppy prefers 17–28°C, Common otocinclus prefers 20–25°C). Their pH ranges overlap well at 7–7.5, so water chemistry is compatible. Both species have low aggression scores (Guppy: 1, Common otocinclus: 1 out of 5), which supports peaceful cohabitation. They occupy different water columns (Guppy: top, Common otocinclus: bottom), which reduces direct competition for space. Overall, these two species can coexist peacefully in a well-maintained community tank with appropriate space.