Anyone know a way to remove hard water stains that is safe for a future reef tank??
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Is there anyway to remove white scale caused by seachem 8.3 from an acrylic tank without draining it? please email [email protected]Anyone know a way to remove hard water stains that is safe for a future reef tank??

i get straight line deposits at the water level line in my DT and use straight razor blades at a 45 degree angle every so often to remove them. works perfectly with no scratches.Distilled white vinegar is a good cleaner and reef safe.
If it is in an empty aquarium, I lay the tank on its side, front or back and lay an old towel or rag soaked in vinegar on the glass so it stays wetted for as long as it takes to dissolve the calcium deposits. If it is a glass tank some stubborn deposits may require scraping with a straigt edge razor blade but do not scrape on an acrylic tank except possibly with an old plactic credit card edge.
Rinse with water and it should be as good as new.

