hello my names mark ,im new to tropical fish, i went out and bought a 60l tetreaguaart tank with hood ,light, anyway i have 5 zebras ,6 neon tetras,2 common plecs, 3 plattys red,blck fins ,lovely colur plattys.2pepperd cory catfish,1 albino cory catfish,3 harlequins, would a black shark with red fins,red tail be okay to go in ,any suggestions, also i just bought a new filter,a fluval u2 which is for 45litres to 120 litres , it has a fast flow which airbubbles come out fast,eould this mean i can take my pump ouy, coz i have lost 3 platys in 2 days just coz the platys were getn stuck behind my pump and couldnt get out,so i just took it out , now, hope its ok,please help any1 ,im new to this,but really like tropical fish as ahobby