I ask because I just spent half my life trying to tie an anubia to a rock using one of these and then realised that metal and fish tanks really don't mix well, I tell you I dont make life easy for myself haha
Here in the US they sell those without metal...like this http://workitmom.com/bloggers/milkan...9/hairties.jpg
They're what I use in my hair, not the ones with metal because if I go to the beach they rust :/
You could also use a plain old rubber band if you just rinse them before hand.
The Boys Atlas blue metallic marble HM
Forest red VT Leander red/pink dragon Delta Mister Intelligent orange/white BF VT Phrixus teal marble dragon HMPK
The Girls Psyche blue/red PK Rhea black/red BF DT
RIP Alexander, Morpheus and Phobos. You are missed :'(