HomeCompare fishPinktail chalceus vs Head-and-taillight tetra Pinktail chalceus vs Head-and-taillight tetra: can they live together? Verdict: Not recommendedThe Pinktail chalceus is aggressive towards other fish.An adult Pinktail chalceus is about 5 times the length of a Head-and-taillight tetra and may eat it.Both are comfortable at 23–26°C (73–79°F).A pH of 6.0–7.5 suits both.Side by sidePinktail chalceusHead-and-taillight tetraAdult size25.4 cm (10 in)5 cm (2 in)Minimum tank210 L (55 US gal)75 L (20 US gal)Temperature23–28°C (73–82°F)22–26°C (72–79°F)pH6.0–7.56.0–8.0Hardness6–18 dGH (107–321 ppm)5–19 dGH (89–339 ppm)TemperamentAggressivePeacefulCommunity tank–ExcellentCare levelModerateEasyDietCarnivoreOmnivoreSpecies profilesPinktail chalceusChalceus macrolepidotusHead-and-taillight tetraHemigrammus ocellifer