hi guys,
Just FYI, not really new news but brother ruslan asked what quantity of CuSO4 is safe for shrimp as plants use it as trace mineral....
found an article, http://www.ams.usda.gov/nop/National.../cprsulfte.pdf pg 13, stating <0.4 ppm.
Not sure how you gonna measure that but if your trace fert like LGM[lush gro micro] has it, becareful how much you dose and how you dose because it's concentrated drops. i suggest you take out 1 liter of your aq water and dose there, then slowly pour into tank. or make a X10 diluted stock solution.

CuSO4 as you may know is used to kill a wide range of pests...including snails, algae, protozoans, etc.

it is also very stable and has to be removed with carbon or 100% WC.

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So many aquascapes, so little time...http://www.my-mac.net/forum/

Absolutely do not use ANY copper , even the slightest bit will kill invertebrates.