Copper Sulfate is used in aquariums, ponds, and pools as an algaecide and also as a treatment for parasitic bacterial infections in fish. The same properties that allow it to work in these roles make it perfect for use as a biocide in PC water cooling. It functions similarly to silver, in that it interrupts the metabolic processes of bacteria and algae. In fact, some hospitals use a combination of the two, in copper-silver ionization, to ensure the sterility of their water source. Copper Sulfate in it's crystal form is blue in color and this is were the slight blue tint comes from.

Dead-Water is very powerful, and should be used sparingly, at 1-2 drops per liter. It can be used alone, or as extra insurance against growth in conjunction with silver killcoils in Pure-sil or other pre-mixed coolants.
In the concentrations present, the copper sulfate in Dead-Water it is reasonably safe, but care should still be taken when handling as it can be a skin irritant. Deadwater should not be ingested, and should be stored away from children. Once diluted into your loop, it is much safer, and poses very mild health hazards.

Warning: May cause skin irritation . Do not ingest. Keep away from children.

Contents:	5% Copper Sulfate DI Water
Size:	15mL

12-31-2011
Reviewer: Tom Servo (23)
Prevents growth within a cooling loop!

11-15-2011
Reviewer: SpoonMan007 (3)
Put this in my loop ONE DROP and nothing grows at all anywhere after 6 months! The best additive period!

07-22-2011
Reviewer: SeeD419 (4)
$5. One drop to the coolant. Kills stuff. Doesn''t get much simpler.