I bought my first tank more then a month ago, and it's been an experience. First, I only had a betta from Pets Unlimited, and five live plants. I've got a filter and heater in there as well. I bought a ph, ammonia, nitrite, nitrite tester and got the cycle started before I put anything in. Bill got fin rot, I think from me not feeding him a varied diet and a sudden nitrite spike and it took a toll to his fins; he's only just beginning to recover. I put in six silver tip tetras and an apple snail, then the tetras got ick, which is thankfully gone now. I've been changing the water every week, have protein based pellets I give my fish all of the stuff I've read up about. I just acquired a free 50 gallon tank from a friend and I'm wondering for advice on if this is a good idea to start up a large freshwater community tank with my lack of experience as well as keep up my 5 gal, and maybe just some tips at least?