Thread: Black marks have appeared on goldfish. One has died, others have the marks!!
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Old 07-09-2006, 10:25 PM
sean mckinney sean mckinney is offline
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First recorded activity by GardenBanter: May 2005
Location: Belfast, N Ireland
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I recollect black marks developing being a sympyom of an ammoni-x burn you might want to check the NO2, NO3, NH3 and NH4 readings. Surf those and take appropriate action
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