I am going to have a tank made - or make it myself - that will measure 30" by 30" by 23". I am thinking of putting a partition in the tank near the back that will create a 3" compartment in the back of the tank. My reason for doing this is so that I can put the filtering system inside the tank and even a uv filter. This way water does not need to leave the tank at all to get filtered - no chances of leaks. Is this a good idea?