The refugium two months ago.
If you haven't set up a refugium on your reef tank yet, you're missing out. I am a big believer in the effectiveness of having it as a part of any salt water set up.
There are many benefits of a refugium:
-Reversing the light cycle of the refugium light and the display light can help keep to keep Ph levels stable throughout the night.
-Harvesting macro algae is a natural and effective way to remove excess nutrients in the water.
-Fuges are a great place to grow pods and other little critters that provide a source of live food for your display tank.
...