HomeCompare fishDemon eartheater vs Redbreast acara Demon eartheater vs Redbreast acara: can they live together? Verdict: Not recommendedThe Redbreast acara is aggressive towards other fish.An adult Demon eartheater is about 3 times the length of a Redbreast acara and may eat it.Both are comfortable at 25–28°C (77–82°F).A pH of 6.3–7.0 suits both.Side by sideDemon eartheaterRedbreast acaraAdult size25 cm (9.8 in)7.5 cm (3 in)Minimum tank210 L (55 US gal)115 L (30 US gal)Temperature23–28°C (73–82°F)25–29°C (77–84°F)pH6.3–7.06.0–7.5Hardness5–10 dGH (89–178 ppm)1–20 dGH (18–357 ppm)TemperamentPeacefulAggressiveCare levelModerateEasyDietOmnivoreOmnivoreSpecies profilesDemon eartheaterSatanoperca jurupariRedbreast acaraLaetacara dorsigera