Hi everyone. After a few months of buying things here and there for my 55 gal tank, I finally got it. I set it up and cycled it the "established media method". I added 3 H. Rosboras. I keep reading I have to add one or two fish at a time. My question is, how long do I wait to add one or two fish? A week or a few days or five days? I put a sponge and a carbon in the 55 gal. tank filter from my 20 gal. tank along with a hand full of gravel from my 20 gal. tank. Thank you in advance for your help.