Yes — a neon tetra and guppy are generally compatible.
Temperatures line up — both thrive around 72–81°F.
pH preferences overlap (7–7) — easy to keep both comfortable.
Both are shoaling species — keep each in its own group of 6+ for calm, confident fish.
Plan on at least 10 gallons for the pair (the larger of their two minimums).
Can a neon tetra and guppy live together?
Yes — a neon tetra and guppy are generally compatible. Minimum tank for the pair is about 10 gallons.