Compatibility brief
Can Molly live with Neon Tetra?
Risky. This mix is commonly discouraged for typical setups.
Molly + Neon Tetra: Known incompatible pairing. Water chemistry incompatibility. Mollies need hard alkaline water (pH 7.5+, hard) and neons want soft acidic (pH 6.5 to 7.0, soft). Both survive mid-range but neither displays full health long-term. Real tanks add variables Fishori cannot model; treat this as a high-risk read, not certainty.
Compatibility score
Profile confidence: medium
Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.
80L
Combined minimum footprint reference for these two species: about 80L (larger active fish often want more length).
Assessment details
Known incompatible pairing
Top issueWater chemistry incompatibility. Mollies need hard alkaline water (pH 7.5+, hard) and neons want soft acidic (pH 6.5 to 7.0, soft). Both survive mid-range but neither displays full health long-term.
Compatible temperaments
Both Molly and Neon Tetra share a peaceful temperament.
Narrow temperature overlap
Molly and Neon Tetra have only a narrow shared temperature range. Maintaining stable water temperature will be important.
Incompatible pH requirements
Molly prefers pH 7.5–8.5 and Neon Tetra prefers pH 6–7. Their ranges do not overlap.
“Water chemistry incompatibility”
Known incompatible pairing
Next steps
Concrete changes, not "research more" filler.
- •Neon Tetra should be kept in a group of at least 6 for best health and behaviour.
Try instead
- →Neon Tetra should be kept in a group of at least 6 for best health and behaviour.
- Seriously Fish. Poecilia sphenops
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Poecilia sphenops
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Poecilia sphenops
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
- Seriously Fish. Paracheirodon innesi
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Paracheirodon innesi
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Paracheirodon innesi
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
Try this next
Build the full stocking list with Molly + Neon Tetra
Plan further
Try both species in the full-stock tank check, or open either fish profile for mates lists. Methodology explains how verdicts are produced.
Individual fish vary in personality. Fishori uses conservative hobby rules. Observe any new introduction closely, feed thoughtfully, and keep a quarantine or backup plan. This is not veterinary advice.
Profile data confidence: high. Based on multiple reputable aquarium care sources with strong agreement.