Shango, Usually only for salt systems (and there are people on this list with vastly greater experience than myself in relation to salt systems (and most other things...)), think canister filter with no lid. There are ultra-expensive high end sumps on the market, but most people just compartmentalize a cheap tank plumbed beneath their main tank. This allows you to run most of your equipment (heaters, skimmers, uv, etc) out of sight, increases your water volume for a little more stability, and gives you a separate spaces to hold non-compatible items like reef troublemakers or aggressive fish waiting to be re-homed, rotifers and amphiopods for live food, or plants/sand/mud and mechanical/biological filtration. Sandu, Cuttings from willow trees root readily (in fact they contain a chemical that can be used as a rooting agent for other plant cuttings) and do well in marshy conditions, so they do reasonably well emersed (but not submerged) in a tank. I've also used Mint and Watercress for this in the past, but they can't deplete the nutrients as fast as a willow branch, so they don't clear things as quickly. Another reasonably quick method is to remove the fish and throw in some daphnia...they're all about eating green water (but pretty much any fish will eat them much more quickly than they can eat the green water). Cliff > 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