A question about lanthanum chloride (LaCl3) toxicity came up in another thread, so I decided to post it here for better exposure to experts. Although LaCl3 is obviously used widely in reef keeping, the material safety data sheet for LaCl3 clearly states that it is "toxic to aquatic life with long lasting effects" (page 2, attached). Now, I'm fully aware that some warnings in MSDSs are included out of an over-abundance of caution based on, for example, one study done 30 years ago at a North Korean community college. That being said, does anyone on R2R know why this warning is included for LaCl3 and why it's nonetheless essentially ignored by the aquarium industry/hobby? [DISCLAIMER: I'm NOT hating on LaCl3 here---this is just an honest question.]. Thanks