Keeping an aro of any size in a 10 gallon tank sounds like a bad idea to me.
well I hate to say it but I did this. I ordered an aro, and what came is was a yoke sac. I am a firm believer in raising small/ new aros alone. I put him in a 10 gal for about a month he was eating flakes and then to hikari floating pellets (mini) and then moved him to a bigger tank.. I had success with the 10 gal... just MHO