My friend wanted to get some new fish... so he told me to get a tank so that he could give me his old ones. I got a 10 gallon tank with a heater, filter and a light(Ill go get one on monday) and then looked up how to keep a tank. I found out about cycling?? I think my tank is cycled but I really have no idea... anyways, we put his fish in yesterday and now i want to check if the tank is ok! I think I have 3 black ruby barbs and 6 golden barbs in the 10 gallon tank. Any suggestions are helpful!