DIY algae scrubber(external plumbing)

[20 gallon nano]

I made this for my IM 20 gallon reef tank. All the plumbing is internal besides the incoming and outgoing from the bottom. Comes in from the main recirculating pump in the sump and goes out from the 2 exit ports into the display.

 

[WIReefer]

Looks great! Keep us updated on the harvesting!