Hi there! I recently took in some fancy goldfish from my local facebook aquarium group that were in need of "rescuing." I've kept fish before, but never goldfish. I got the fish and the tank for an amazing deal and it was only after I got them that I started really reading up on goldfish specific care. The main problem is that I think my tank is already overstocked with three small-medium sized goldfish (it's a 30 gallon tank). The second problem is that when I got the tank and the fish the previous owner wanted to keep his filter so that didn't come along with them. I bought a new one from the pet shop that same day but it obviously isn't cycled (I am familiar with cycling a tank). I didn't think to ask the previous owner to give me some of his used filter media, I may still be able to ask him for some?) The fish do look good to me and seem healthy, so that's a plus. Since this was a bit of a spur of the moment decision I am not really in a position to go out and buy a brand new tank. I decided to come here and get some recommendations and help. Thanks!