hi all, new here, have 29 gal tank, was my son's for a year, things went down hill, not the tanks fault

, any way I have it cleaned and running for 2 weeks now, everything going well, I think the cycle is going well, all the other fish are doing fine, "luther" my dojo loach the first few days was very active in the evenings, putting on quite a show, but this last week, he is always hiding and never comes out ?? I thought he might be dead or dieing, finally rousted him out seems ok, but prefers to hide under something or the gravel all the time.. I read they were pretty social ,to humans as well, but he is a real recluse.any thoughts ? water temp 74-76.
thanks !
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