Great to see you got your first arapaima! On the growth rate topic you def won't see the 2-4 inch per month. I have had mine for a month now and I have not seen 2-4 inches Put on, I'd say the growth rate would be 1-2.5 inches, I am feeding mine fat head minnows, blood worms, freeze dried blood worms, live tubifex worms, spectrum pellet .5mm, frozen adult brine shrimp, earthworms, small pieces of uncooked shrimp, pieces of tilapia, pieces of scallops, and lastly silversides.
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Sent from my iPad using MonsterAquariaNetwork app