Phil, thanks

How many micrograms of silver per liter are we at?
Some papers that go into the mechanisms of toxicity


Multispecies toxicity test for silver nanoparticles to derive hazardous concentration based on species sensitivity distribution for the protection of aquatic ecosystems
Hazard concentrations at the 5% species of 0.614 μg/L
https://www.researchgate.net/publication/285734556_Multispecies_toxicity_test_for_silver_nanoparticles_to_derive_hazardous_concentration_based_on_species_sensitivity_distribution_for_the_protection_of_aquatic_ecosystems

One of the main mechanisms of toxicity is that it causes oxidative stress through the generation of reactive oxygen species and causes damage to cellular components including DNA damage, activation of antioxidant enzymes, depletion of antioxidant molecules (e.g., glutathione), binding and disabling of proteins, and damage to the cell membrane

Molecular toxicity mechanism of nanosilver
https://www.researchgate.net/publication/261182756_Molecular_toxicity_mechanism_of_nanosilver

Harmful Effects of Nanoparticles on Animals
http://www.hindawi.com/journals/jnt/2015/861092/

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3359871/
Toxicological studies on silver nanoparticles

Fish Kill: Nanosilver Mutates Fish Embryos
http://www.scientificamerican.com/article/nanotechnology-silver-nanoparticles-fish-malformation/

Popular nanoparticle causes toxicity in fish, study shows
http://www.purdue.edu/newsroom/research/2010/100301SepulvedaNanosilver.html
On 3/12/2016 12:23 AM, Phil Morrison wrote:

@Max

There is little evidence that pure colloidal silver is highly toxic to any animals, marine or otherwise.

Quite the reverse, in fact, as sickness is highly correlated with mineral deficiencies, especially selenium and silver.