Do snails eat oily surface film? - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 02-15-2007, 05:15 PM Thread Starter
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Do snails eat oily surface film?

I was happily observing my aquarium today and I noticed a snail attached upside down to the water surface like it was a solid (matrix style) and I couldn't help but wonder if he was trying to eat the film at the surface. What do you think?
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post #2 of 4 (permalink) Old 02-15-2007, 05:21 PM
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my Ramshorns seem to do that to adjust the buoyancy in their shells by changing the bubble trapped inside. They also may float up, then extend their bodies to simply increase their chances of finding something to catch on to so they can get back down again. I have never observed them actually eating any film on the water surface, though they will eat debris washed up at the tank glass waterline.


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post #3 of 4 (permalink) Old 02-15-2007, 05:21 PM
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No, they won't. If you have a canister filter, turn the outflow upwards just a tiny bit...it'll help to get rid of it.
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post #4 of 4 (permalink) Old 02-15-2007, 09:37 PM
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I've read that black mollies will eat that film on the surface.
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