Subject: Is green algae dangerous to dogs?

In aquariums, the existence of green algae is a nuisance, but not 
dangerous. The existence of brown algae is indicative of "sick" water. 
Canids drink from ponds that have green algae in them with no discerable 
harm. But I was told that if your dog's drinking bucket has any green 
algae (not brown & not blue-green) in it , that this is indicative of 
animal neglect. Is this , indeed, a fact, or is this a needless worry?

Re: Is green algae dangerous to dogs?