A slit drain is a narrow slit cut directly into the liner at the lowest point of the biofilter bed. This allows water to exit in a wide, thin sheet, which not only facilitates smooth drainage but also enhances oxygenation as the water re-enters the fish tank. It also means not having to buy any plumbing parts or connections, which reduces costs and reduces the amount of plastics.
Admin Changed status to publish 29 March 2025