Feeding Tadpoles to Oscars

Now after reading up on this i cannot seem to find a clear indication about Feeding tadpoles to my Os or not.
All the articles i've read states that they might be poisonous(bearing in mind that it was responses from overseas posts/members)

The pool/s where i can get them from is NOT sprayed with any pesticide - I asked about that specifically-
There also seem to be other live organisms in the water but strangely no mosquito larvae.

I've seen al sizes of toadfrogs from tiny black ones to some larger ones that actually resemble glassfish(seethrough bodies).

The water tested clear with my testkit.

 

Hi slojo
I don't know about oskars but i feed the tadpoles from clicking frog, grass frog and platana all the time to my Allenbatrachus and never a problem. I'm not aware that any tadpoles are poisenous not even if parents are highly toxic. Some frog and toad tadpoles secrete a growth stunting hormone if population density becomes too high but i don't think it will effect fish