Little Worms?

jamie2010

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Aug 3, 2006
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sunny old essex
hi all.i have a juwel 125.at the back of the tank (on the inside) where the bubbles from the air supply pop i always get an algae build up of green sludge.i was cleaning this off last night when i noticed small clear worm like creatures moving around in it.
what are they?
are these a threat to fish health?
thanks guys.
 
Planeria, maybe. They are caused by you not cleaning the tank enough basically.

No, they aren't normally a problem for fish health.
 

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