I'm trying to decide what kind of filtration system to use on my 40 gallon breeder I want to use a sump but have no Idea what the cost of it should or could be I don't want it to be more than 15 gallons. And I don't know how it works do you have to drill holes in the tank?
Please explain how a sump works and how much it cost.
Please explain how a sump works and how much it cost.