solution for xenia removal

[purplepolypeater]

i have had a tiger cowry for about 4 months and every night it would trawl the glass feeding on algae. last week i found it parked on a patch of xenia. at that time i had 6 colonies about 2-3 inch thick 10 inch high on my sandbed to prevent wild growth. today i have run out of xenia. my snail is back on the glass. i have never heard of anything actually eating it. if you dont want xenia try one out. just thought id share as i seem to do ten times more reading than posting as i use my ps3 for surfing and dont have a keyboard.
im trailing off topic.