i recently brought an electric catfish that's about 2-3 inches. i put him in a 75g tank with a small bichir,a 7 inch black ghost knife,angelfish, bamboo shrimp,zigzag eel and a knight goby. the goby, eel and bichir already got shocked. 
Will it damage my fishes permanetly with the shocks?And is it ok to put them together till the catfish reach 5 inch?

Will it damage my fishes permanetly with the shocks?And is it ok to put them together till the catfish reach 5 inch?