hi im new to salt wtaer fish tank and fish,i have built my own sump using 2 50 litre tanks,i drilled holes in the side of the tanks and joined them together i have put live rocks in my sump,but because it is not a real sump with pertitions in it it doesnt seem to stop much waste,it does stop alot but not as much as the real sumps in the shops,and as i cant afford to buy one,this is why i made my own,i have a 500 litre tank and the 2, 50 litre sumps,i have an overflow system on the side of my tank also with a skimmer on the side of tank,i am at the moment in the process of downsizeing my tank as i cant afford to run it properly,with all the waterchanges,salt is expensive,i have a smaller tank in a cabinet that im hoping i can build into a salt water tank,but again as im on a pention i cant afford a proper sump system,if i could win this sump it would make life alot easier and cheaper for me to run my tank,hence a good sump would mean less water chnges and less salt,so would cut my costs down so i can have a tank that sort of looks like and as good as the ones in the shops,please let my luck change so i can win this please,thanks