Quote:
Originally Posted by BCOrchidGuy
I think it is a coralife but the paper insert must have moved because it was floating higher than it should have been.
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If you suspect the paper has moved in any hydrometer, chuck it out. Useless.
Any good glass hydrometer will have a green or red mark on the inside of the glass that matches same mark on the paper. If they don't line up then the paper has moved. Chuck it.