hey i was wondering if anyone could help me....i just bought one of these and it has everything with it im just not sure where everything goes to set it up, can anyone help me, it has the 4 slots in the back, the far left one has the sponges in it....i need to place the heater,pump and filter parts in but dont know where they go, please help me!!....i also have the skimmer that goes with it if anyone knows how to set that up