Prefilter
Use a screen from your Magnum diatom filter as a simple DIY prefilter for your overflow box.
By Ken Uy
The plastic screen cylinder that's used to support the diatom cartridge in a Magnum filter makes a good, easily washed prefilter for an overflow box. It slips right in the bulkhead, and traps algae and big particles. It doesn't have enough nooks and crannies to make rinsing it off difficult, so it won't become a nitrate source since it's just sooooo easy to slip it off, rinse it off, and slip it back in.
May 2008 Advanced Aquarist is Now Available
International Marine Aquarium Conference '08