mine get eaten as soon as they are on the glass

in all my years i have only had a couple survive to wrigglers,i think completely my own fault,
and the one that is happily swimming with the grown ups was a complete fluke that it ever survived.
the gravel that it was in was in the garden in a bucket for a number of days as i was gutting
the big tank,then i had gravel over so i put it into a small tank in case i ever managed to get some eggs
and i noticed him wriggling around the bottom
i wish you every success indeed and do please keep posting on your progress