I'm in the process of building a new sump, due to some design issues with my current?one. ? It?has?the primary drain going to one end of the sump where the skimmer is and the secondary drain going to the other end which was intended to be a refugium. ?The return section is in the middle. ? The problem is that there just isn't anywhere near enough flow in the refugium area. ? I found that if I took the return line from my two media reactors and put it into the refugium that it helped some, but because I had to restrict the flow so much going through the carbon and GFO it still really wasn't enough.A while back I saw an email from one of the big online Reef sellers advertising an LED rope light that could wrap around a reactor and allow it to grow algae. ? I don't really need to run GFO or carbon all the time so I decided to give that idea a try. ? The wall behind my tank is shared with the garage, so my reactors, skimmer overflow, and top off stuff is all out there. ? I cleaned out both reactors and used a simple lamp from Home Depot with a 6500k bulb in it. ? This also let me open up the valves to allow a lot more flow through the system. ? So far it's been working great. ?I ran just one for a while (the other still had carbon in it) and over the weekend I had to cut back the chaeto since it was almost completely filled so I decided to use both for chaeto. ??View attachment 253