Compatibility brief
Can Pea Puffer live with Splash tetra?
Caution. Check the issues below before buying.
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).
Pea Puffer is a fin nipper and Splash tetra is vulnerable to nipping — long fins are a common target even when water parameters match.
Assessment details
Temperament difference
Top issuePea Puffer is semi-aggressive, while Splash tetra is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely.
Fin nipping risk
Pea Puffer is a known fin nipper and Splash tetra has long, flowing fins. Pea Puffer will likely harass Splash tetra.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
Narrow pH overlap
These fish can share water but their ideal pH ranges overlap only slightly. Aim to keep pH stable in the shared range.
“Pea Puffer is semi-aggressive, while Splash tetra is peaceful”
Temperament difference
Next steps
Concrete changes, not "research more" filler.
- •Provide plenty of hiding spots and visual breaks so Splash tetra can escape if harassed.
- •Avoid keeping Pea Puffer with long-finned fish like Splash tetra.
- •Pea Puffer should be kept in a group of at least 6 for best health and behaviour.
- •Splash tetra should be kept in a group of at least 6 for best health and behaviour.
- Seriously Fish. Carinotetraodon travancoricus
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Carinotetraodon travancoricus
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Carinotetraodon travancoricus
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. Copella arnoldi
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Copella arnoldi
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Copella arnoldi
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 Pea Puffer + Splash tetra
Plan further
Check each species’ mates list, size the glass, then verify the full stock in the builder. 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. Checked against several solid care sources that mostly agree.