I'd have no more concern eating salad greens from a floating raft than from a traditional garden if the pond is healthy.
I'd have huge concerns about either if the pond or the garden soil were unhealthy.
Then again, I'm quick to agree with the flaring raft because I appreciate aquaculture and aquaponics.
I think fish waste is excellent plant food and a far safer source of nitrogen than bags of chemical waste from a big box store.
As far as I can find, fish don't carry pathogens which transmit to humans. I think some water snails may carry liver flukes, but if you wash the greens and be careful not to eat any uncooked snails, it should be as safe as regular garden salad.
bird droppings would be the main concern IMO. Which is the same as a normal garden
"You must be the change you want to see in the world." "First they ignore you, then they laugh at you, then they fight you, then you win." --Mahatma Gandhi
"Preach the Gospel always, and if necessary, use words." --Francis of Assisi.
"Family farms work when the whole family works the farm." -- Adam Klaus
If you have giardia present in your pond, their cysts could get splashed up onto any leaves in or near the water surface. Giardia has a wide mammalian host range (beaver, muskrat, livestock, dogs, humans, etc.), so if their feces gets washed into your pond, there could be a risk for giardiasis.
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