Boarderguy
Chief Narctopus Wrangler
They problem, as @Belzelbub alluded to, is that your tanks were twins. Siamese twins connected at the shoulder and waist are naturally sterile and can never reproduce even once separated.I think they have to be active to breed. I've had a pair of 130s in storage for a couple of years because I haven't had the money to get them hydro'd and they sadly show no signs of reproducing.