Your foreground plants would never make it with geophagus... they are eartheaters. You could do away with the ferns and probably some Amazon Sword plants, root them well as Geophagus are real diggers. You could go for Acarichthys Heckeli, Geophagus Jurupari or the real el cheapo Geophagus Surimamensis. You could compliment them with plecos.

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