Hello, all! I'm kinda new to fishkeeping, in that I've had a 10 gal. tank with just a few danios & a small plec type fish for about 5 years. Hardy fish, and easy size to maintain. Well that all changed when I was lucky enough to get a 55 gal. tank, including fish, gravel, and some sort of power filter hanging off the back- all for free from my father who had to move. Some sort of light bulb finally went off in my head and I thought I'd look up fish forums on the net, so here I am! I'm sure to have plenty of questions, quite a few of which have probably been covered already, so please bear with me, and thank you in advance.