Got up Saturday morning, and decided to put in a pond in my front entrance garden area. It's nothing fancy at all - just a 140 gallon pre-formed thing from Menards. I got it in the ground, water in, fish in (I know, i know, but my 3rd old talked me Into a couple goldfish at walmart). Now I don't know what to do. Goal is to KISS. No external waterfall or external filtration if possible. Will be putting a fountain in the middle. Right now I have a MJ900 pointed at the surface for agitation. Water is very cloudy, can't see if the fish are alive or dead. Can someone give me the really quick 101? I want to put some simple plants, and be able to see my fish. What do I need to do (remember, simple and cheap is good). Help direct me!