It's for a 518 gallon fresh water tank
i'm thinkin monster fish so a couple rays, clown loaches, pleco, arowanas, clown knife, oscars,
it has 2 1 1/2 inch pvc pipes already drilled thru the bottom, and i am gunna silicone in 2 overflows, so i need a large enough sump (don't know what to use) and a good desciptive post of how to make one and what to make it outta(don't want to buy a huge tank cuz that would be to pricey and i want something cheaper then a store bought filter)
not sure how much turnover i am lookin for any suggestions would be good
so yeah, anyone have any ideas on what i would need to make it and how to go about doing it???