And for the overflow pipe.....ive been thinking about that a lot but im not sure what i should do...ive been reading on the durso overflow pipes but they seem to be limited on flow rates, and all the other systems that seem good require multiple bulkheads, I have one 1.5inch bulkhead in each overflow. what i did before was use no pipe and just filled the whole thing up with bio balls, put some sponges at the top and it ran perfectly with no sound at all. the water just ran over everything and out the bottom, i suppose i could do the same thing with live rock. I was also thinking of having a 1.5 inch tube coming up and then a 3 inch tube outside of that that was open at the bottom, fill the middle space with live rock rubble or something like that and leave the top of the 3 inch slightly above the water line. so water would flow down the overflow box then back up through the live rock rubble then back down through the 1.5 inch pipe.