I have a small refug area on my sump. What is the best stuff to put in it?
I know a LED light, some cheto but what else should I use? Mineral mud?
http://www.drsfostersmith.com/produc...8&pcatid=18378
-Do you have to change that our every year? or do you put sand on top? I was even just thinking of putting rocks and cheto with no sand.
I seen people use some of these blocks that are very pours. What are they called?
Thanks for the input everyone!