Anyone know a micronutrient supplement

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I use Seachem Floruish Pottasium, Nitrogen, Phosphorous for macro and Bigals PlantFood suppelement for mirco. But the bigals and all other brands I looked at have 0.0000001% cooper. My shrimp died.

http/www.fishforums.net/index.php?showtopic=106604

 

[zig]

Your tapwater probably contains more than 0.0000001% copper, i seriously doubt its the reason your shrimp died.

 

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do you recommend that I keep using it with the other shrimp?