i need a sump.... simple as that. so ive been shopping around. manufactured sumps have a ton of bells and whistles, but do i really need all of that for my 36 gallon fowlr? they start in the $150 range. why are they so expensive compared to diy? i mean it seams like i could buy a $5 10 gallon tank from craigslist. have two sheets of glass cut at home depot and silicone it all together..... pump over flow and done right?