Hi. I have a 1.5 gallon bowl (yes, I know it isn't good, but my 2.5 gallon tank broke and I plan on buying a new one soon), and I have a lot of questions about cleaning it. 1. How many times a week should I clean it? I cleaned the bowl yesterday so I'm good on that for now. 2. What can I do when it starts to smell? I know I can't use any soap, because that would just be very bad. I rinse the marbles very good, so there is no left over food. After a while it can start to smell. 3. How many decorations should I put the bowl? Should I put any because I want him to be able to swim. Right now I have something he can swim in and out of, but I don't know if I should put a plant in instead. Any suggestions would be nice!