hello every1, its my first time into fish business and this is my 5th month. I stocked 1000 fishes. my fishes are not growing as fast as I would av loved them to be. I can count d numbers of fishes Dats up to 1kg and I also notice that dey open their mouths towards d inlet of water especially wen am filling back the tanks after draining dem. lastly i noticed some fishes refused to pass d juvenile stage after 5months of feeding them while some are so slim with big heads and so sluggish wen dey move. I call dem Zombies. pls wat can I do to keep them healthy again?

Am a 30yrs old handsome guy and lives in benin. I want a pretty gal for a relationship. My pin. 221bb1b7. Tnx