Well, I think I've officially lost track of the days (weeks, months...) we've been raising these little guys. I know they are very delayed for sure. The batches we gave to two other families are well ahead in development, some are nearly full grown frogs. Nevertheless, we do have some progress, hind legs have developed on most of our tadpoles recently. They are now carnivorous, eating blood worms which we feed them daily.
I don't know what we've done "wrong" with these guys that has resulted in them being so behind, but it isn't for lack of trying. We've tested about every variable in their living conditions possible:
-cleaning the water more frequently
-leaving the water alone and letting it get slimy and green
-using water from different sources: stream, pond, lake, river and de-chlorinated tap water
-we've had the tank inside and outside
-installed a filter and bubbler
-no filter or bubbler
-feeding algae wafers
-adding rocks/plants
-no rocks/plants
I've noticed the greatest growth spurts have occurred consistently during the first few days after a water change, then it slows again. That could just be coincidental though.
The pump I bought (brand new) a few weeks ago to filter and oxygenate the water stopped working yesterday. I'm guessing the motor burnt out from being overworked. Or it could have been faulty. Either way, I didn't keep the receipt so can't bring it back and am not buying another one. So they'll have to do the rest of their growing in still water that I'll change up for fresh every few days. This is getting to be a drag and a lot more work than reward. Still, we'll keep at it and hopefully soon we'll have frogs to admire and then release.
Aren't those little legs adorable though?