Yantie

I have an aluminum water tank that had an algae inhibitor containing Copper Sulfate Pentahydrate added to the water. I am seeing a corrosion reaction - pitting with a white substance created on the surface of the aluminum. I've rinsed it and washed it, but haven't been able to stop the reaction. Is there anything that will neutralize this reaction, that won't in turn cause a different reaction with the aluminum? I now have an algaecide that won't react to aluminum, but I need to solve the old problem first. I'm finding Sodium Carbonate/Soda Ash or possibly Ammonia as solutions to neutralize the copper sulfate, but I also see that those products may cause trouble with my aluminum tank. Any help would be greatly appreciated!