Patience grasshopper. Give it some time and before you know it you'll have millions of springs roaming that container. I bought a culture, shipped in peat from a reliable source on the board. I did almost the same thing as you did, but I didn't dump the whole culture into my 6 qt container, I just nestled the cup of springs down into my carbon and seeded around it with yeast. For the first few days, if not a couple weeks there was not alot to see, but after that they took off. Baby springs are almost too small to see, but trust me, pretty soon you'll be feeding out very frequently or be splitting our culture.