Ed I'm looking forward to this tank, i'm a big Apiso fan too i'm looking for a new pair to go in my biotope tank after my original pair a A. iniridae died of a infection after i introduced some tetras from shoddy lfs beginning with the letter 'B'. Anyway have you got a group of juviniles as or do you know the sex of your apistos? are they wild or tank bred? What are you doing with the Biotoecus, these have to be in my top 5 fish of all time even though i've never kept them. I was thinking of getting some form Mark but was a little scared off by the price and that they're even more delicate than Apistos. Think I'll go and buy myself a new pair of apistos soon.