I've had my male jd for a year and a half now in a 55 gal by himself. All he does is hide. I can't even watch him eat, have to turn the lights off for him to come out of his cave. I bought him a female ebjd which he didn't care for at all, gave that a few months and now have her in a separate tank. What can I put in there with him to make him not so sucky? He must be miserable... maybe a con? or a fm? some giant danios? filtration is 2 ac 110's and a eheim canister made for up to 90 gal tanks.