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Old 01/09/2008, 11:50 AM
Davidb6 Davidb6 is offline
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Join Date: May 2007
Location: Woodbury, CT
Posts: 492
White vineger works great for coraline. The time to soak is based on how covered it is. I have an old toothbrush (new, unused) I use to clean things off.

Soak it, brush it off, soak it more if necessary. Make sure you rinse off the vineger very well before you put the pump back in the tank.