I am restocking my 60 gallon freshwater aquarium. It is going to be a planted tank (i'm slowly getting that down). Once I finish I am going to began ordering fish online. How do I go about adding the fish without causing a huge ammonia spike? I will be ordering all the fish at once since the shipping is so expensive. I will be ordering 15 neon tetras, 10 rummynose tetras, and maybe another type of fish. I know I can't add 25 fish in all at once. I have a extra 10 gallon tank I could hold them in for a few days but I can't keep them in there to long. Advice please?