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gr81
3rd Mar 2006, 11:02 PM
Hi,

Is zinc toxic to shrimps? I need use screws to fit AL cooler in chiller and all screws are made of zinc.

droid
11th Apr 2008, 03:44 AM
If I remember correctly, most screws are coated with some Zinc Chromate. Other screws may be brass or "Galvanized". All contain heavy metals, I believe.

The best screw for a shrimp aquarium may be of stainless steel. Does anybody know the composition of stainless?