I have cycled my 50 gal tank (fishless cycle 2-4ppm Ammonia) 0 ppm Ammonia in 24hrs. I'm filtering with a Ehiem 2215 and an emporer 400. I then stocked the tank with 5 - Gresheaki's and 7 Yellow Lab's all juvinilles. Between 1"-2". I would like to add another 15 juvinille cichlids and 5 young syno catfish. I intend to keep them in this grow out tank till my 150 cycles. Probably be in the tank for 2 - 3weeks. Is this too many fish to house in a 50 gal for 3 weeks?