That website explains exactly what they are!
All along I had been hoping they would be something more fun. But at least I have one red featherduster out of nowhere! 
Should these snails be removed?? Pump problems?
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28g Nano Cube drilled with 13g sump in stock stand. Vertex IN80 Skimmer, Phosban 150 Reactor, Apex Controller, DIY LED with stock hood, dimmable
Established March 2006
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