HomeCompare fishEel Loach vs Freshwater butterflyfish Eel Loach vs Freshwater butterflyfish: can they live together? Verdict: Not recommendedThe Freshwater butterflyfish is aggressive towards other fish.An adult Eel Loach is about 17 times the length of a Freshwater butterflyfish and may eat it.Their preferred pH ranges don't overlap.Both are comfortable at 24–26°C (75–79°F).Side by sideEel LoachFreshwater butterflyfishAdult size190.5 cm (75 in)11 cm (4.3 in)Minimum tank75 L (20 US gal)75 L (20 US gal)Temperature24–26°C (75–79°F)24–30°C (75–86°F)pH5.0–6.06.7–7.5Hardness5–12 dGH (89–214 ppm)2–10 dGH (36–178 ppm)TemperamentPeacefulAggressiveCommunity tankGood–Care levelEasy–DietCarnivoreCarnivoreSpecies profilesEel LoachPangio anguillarisFreshwater butterflyfishPantodon buchholzi