TWPINC.COM :dance:
I'm building my design for the Jebao WP25's. I'm the 0.28" 12 hole mesh- Epoxy coated- Stainless Steel wire mesh above (middle pic). If they're Epoxy coated, I believe they will be reef safe. Don't use anything that's made with copper, because some of those metals have copper in them. The problem with using netting or screen is that it doesn't hold it's shape as well and the holes are typically too small and clog easily. However, as D-Nak put it..."it only takes one tentacle to get sucked through the mesh and the Nem is done."
I have .010", 0.23", 0.25", 0.28" wire diameters and the wire mesh holes also very in size depending on how many holes per inch. The lower the number, the bigger the holes get. The diameter, metal, or material the wire is made of will determine how easily it bends or can be cut.
I Think anywhere from 12, 10, 8, 6, and 4 hole mesh sizes will work, but the bigger you go with the holes, the easier it is for the Nem to get a tentacle through. I've bought different sizes to play with until I figure out what works best. You also have to keep in mind that the closer the mesh is to the pump, and the hole size you choose- will create more/less suction outside the mesh. This can become and issue for a wondering Nem who decides to plant on top of the PH. It can also starve your pump if the mesh is too small or gets clogged. Too big and you risk coming home to a cloudy tank with a dead Nem hanging. So with that in mind, you have to be careful with your design. We all want the clean look, but I think it's best to stay at least an inch away (If not more) from the pump on all sides and use a smaller mesh even if it needs frequent cleaning. I picked my mesh size after getting feedback from Tektite. She ran the Vortech guards that you see above for over a year and told me that she would go with a little bigger screen and do things different next time. We talked about the material, and distance (guard to pump). Feedback was interesting and help me make a better decision for my design.
I'll post pictures of mine when I'm done, but the Jebao's are harder to work with due to the power cord and shape. If anybody is running the WP25's, here are a few pics if you want to get your own project going. I've also listed the website above where the screen and mesh wire can be purchased.
:beer: