HomeCompare fishDemon eartheater vs Flag acara Demon eartheater vs Flag acara: can they live together? Verdict: Not recommendedAn adult Demon eartheater is about 3 times the length of a Flag acara and may eat it.Both are comfortable at 23–26°C (73–79°F).A pH of 6.3–7.0 suits both.Side by sideDemon eartheaterFlag acaraAdult size25 cm (9.8 in)8 cm (3.1 in)Minimum tank210 L (55 US gal)75 L (20 US gal)Temperature23–28°C (73–82°F)22–26°C (72–79°F)pH6.3–7.05.2–7.5Hardness5–10 dGH (89–178 ppm)5–12 dGH (89–214 ppm)TemperamentPeacefulPeacefulCare levelModerateModerateDietOmnivoreOmnivoreSpecies profilesDemon eartheaterSatanoperca jurupariFlag acaraLaetacara curviceps