Mp40 anemone guard?

[anthony]

I've seen some MP40 guards that also have flow direction. Built in, does anybody know if those work and are they worth the money. Does anybody here sell the type?

 

[scuba steve]

I've never tried the ones that have flow direction. I've used the NemProtect Guards on my tank and I like them. Biggest feature for me since I don't have an anemone anymore is that they keep your wet-sides shaded and clear and it's easy to pop them off to soak in vinegar every other month or so for the coraline that grows over them.
I've got 2 spares if you want them for $20ea