HomeCompare fishGlass knifefish vs Eel Loach Glass knifefish vs Eel Loach: can they live together? Verdict: Not recommendedThe Glass knifefish is best kept in a species tank.The Glass knifefish is aggressive towards other fish.An adult Eel Loach is about 5 times the length of a Glass knifefish and may eat it.Both are comfortable at 24–26°C (75–79°F).A pH of 6.0 suits both.Side by sideGlass knifefishEel LoachAdult size35 cm (14 in)190.5 cm (75 in)Minimum tank210 L (55 US gal)75 L (20 US gal)Temperature23–28°C (73–82°F)24–26°C (75–79°F)pH6.0–7.55.0–6.0Hardness2–15 dGH (36–268 ppm)5–12 dGH (89–214 ppm)TemperamentAggressivePeacefulCommunity tankNot suitableGoodCare levelDifficultEasyDietCarnivoreCarnivoreSpecies profilesGlass knifefishEigenmannia virescensEel LoachPangio anguillaris