I wonder if any of you guys out there could help me please. I am in the process of buying a 90 gallon tank with a three section sump. I have never used a sump before, but have been told of its superior filtration capabilities. I'd like to know the best way of setting the sump up please. I would imagine that the end section would be for heater and return pump. What media would be the best for the other two compartments also where is the best place to buy sponges if indeed sponges are needed. I am sorry for all the questions, but i would rather get it right first time straight off. Thank you in advance.