They are a breeding pair of Silver Angels, Pterophyllum Scalare. They measure about 5", are about 2 years old and spawn every 10 days. Other tankmates are 8 Cardinals, 8 Rummynose, 4 Otos, 2 Botia Striata, 2 Cory Julii and 1 Amano shrimp which I spotted the other day after thinking it had been eaten!!
I'll post a full picture soon when my Red Ludwigias mature and block the view from my filter inlet and co2 diffusers, a full pic won't do it justice at the moment.
Thanks for the nominations and complements, it makes the hard work worthwhile, although I never see it as hard work