Sumps are often a 20 or so gallon aquarium - or a fancier acrylic box with built in dividers and such. water runs from the main tank into it and usually through filters, protein skimmers and by heaters etc along the way. Often somewhere in the sump setup there is a section with live rock which provides more filtration and a section where you grow macro algae or mangroves to harvest nutrients. The macro algae is cut out and either discarded or feed to plant loving saltwater fish. Of course to grow the plants you need lights and since the light cycle causes PH differences often the sump lights are on opposite the main tank lights. The other place you often see a Mangrove is in a hang off the back refugeum which general has some live rock and algae. Now I wanted a Mangrove for a planned mudskipper tank..... Cheers! Linda On Jul 12, 2008, at 3:06 PM, Shango Los wrote: > So let me repeat that...people plant this plant in their sump? > Isn't that a > closed device? I don't have any experieince with that. > > Thanks for tolerating this totally noob question. > > Shango > > _______________________________________________ > GSAS-Member mailing list > GSAS-Member@thekrib.com > http://lists.thekrib.com/mailman/listinfo/gsas-member _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member