Originally Posted by Mori
I wonder how dobsonfly larvae would do in a tank. Now that would be worthwhile.
Hellgrammites do great in a cool water high current tank. Not being 100% sure of their diet, I feed frozen mysis shrimp, sinking algae wafers and Hikari crab bites. I basically only collect them as an interesting live food for my Oscar, who appreciates it very much.
Two drawbacks -
1. You'll hardly ever see them, as they like to stay under rocks and wood, or even buried in leaf litter/sand. They are easy to find in the tank though...you know it when you have one (or one has you :P).
2. Come September, they climb as high as they can (up airlines, fitler tubes, etc.) perch, shed their exo, and fly through the house seeking a way out, causing the spousal unit to lapse into coniptions. This won't happen each year if you collect the small black ones. I think their larval stage is 3 years. I only collect the large reddish brown ones, who are in their last instar as a larvae. Butterbean (the Oscar) tends to ignore smaller food, so I'm stuck with fliers every fall.
As soon as the Shenandoah River warms up a bit more I'll be collecting some, as well as chubs, stonerollers and darters...maybe a coldwater Appalachian river eco-system tank would be fun...