Oliverian, where are you getting the tadpoles?
Its probably a stupid question on my part, but there's a type of fish in your area that will be schooling around this time of year. They look just like taddies at first glance, but they're some sort of catfish I believe. At any rate, the first time I saw them I took it for a mass of tadpoles until I reached for one and got the pectoral spines.
Like I said, probably a stupid Q.
Revenge is a dish best served cold...
With a side plate of steaming entrails,
And a nice Bordeaux!