I have 2 African Dwarf Frogs in a 20 gallon tank. I found out that they mated because today I looked in the tank and found little black things swimming around. I'm not sure if I should take them out or not. I have 2 Dalmatian Mollies, 4 Zebra Danios, and 3 Silver Hatchetfish in the tank with them. Are any of those dangerous to the tadpoles? Please reply!