Hey there, I'm new so forgive me if this is wrong. I figured it wouldn't hurt to ask. I've recently upgraded from a 10 gallon to 50 gallon tank. The first question is that I'd like to know if there's somewhere online where I can purchase filter media from an established tank to jump start the cycle for my 55. Next question is about the 10 gallon, I've been looking for ideas for my tank and I think I found it. I'm really interested in getting a blue spotted sunfish and as it only grows to about 4 inches would it thrive well in a 10 gallon if it was the only fish in there? If so would I be able to have tank mates for it and what could they be. I'd appreciate any info you can give me. Thanks!