Quite often one of the first questions a newcomer to planted tanks will ask is – “Does this contain copper?” when referring to one plant food or another.
More often than not this is because of the “Copper Myth” – Much like the Nitrate/Phosphate/Algae myths the copper myth is enduring…..
The Myth – Copper kills inverts
The Fact – Copper treatments (can) kill inverts………plant foods are not copper treatments.
Here’s a fun fact – Haemoglobin that carries oxygen to our cells requires Iron…so we bleed red. Haemocyanins the invert equivalent you might say uses Copper in the same way, so they bleed blue.
Lets take a look at the figures – The Median Lethal dose or LD50 is the level required to kill half of the population of a given group. Below is a table showing the LD50 for various species – If you have a value for your copper level either from a test kit or the output from one of our calculators, you can input the value at the bottom of the table and see how you fair. Just hit “Update” after.
This information is for reference only – quality studies are few and far between – your mileage may vary.
Based on the original research of Wet – Petalphile.