reiverix said:These types of algaes handle a blackout very well so I wouldn't bother. If you can keep the DIY stable then keep it running otherwise there's not much point running it at all..
how do I know if it's running stable or not?
I have two 2L bottles hooked together and the output is a glass diffuser (like this one http://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=9915&N=2004+113779