That is an ingenious (sp?) looking homemade rig, Bruce.
I foresee a possible combination of my daughter's "BG in a 10 gallon aquarium" project and the 100 gallon Rubbermaid trough which will be surplus for the Winter when my heifers finish off their current pasture.
When I tell my wife it was all your idea, she's really gonna hate you.
What (if anything) are you using for a screen at the drainhole? Please keep us informed of the both the progress of the YP and the status of the do-it-yourself fish Condello-minium.
Cecil:
Would the delayed gonad development be a likely result of constant temperature overwintering in other species (say, BG)?