I have about a 50 litre tank. At the moment I have 1 betta, 3 khuli loaches, 1 pygmy cory (he was alone in the tank at the store for 6 months). I want to add 5 more pygmy Cory's, 6 celestial pearl danios and maybe some shrimp. I'm not sure if the tank will be overstocked or how many shrimp I can keep. Any advice will be helpful!