All the remaining Platy Fry that were born in December are now in the main tank. The final one of the four that survived has made its way to the main tank. She was the smallest of the batch so waited until she was bigger to release her.
The fry can all be sexed now, there are 3 females and 1 male.
I have also bought a Daphnia culture kit, it arrived a few hours ago, have added the live culture to some bottled water and will leave it till water turns clear and give them a feed. I am certainly getting into unknown teritory doing this.
I was in my local shop getting some frozen bloodworm's and there was a tank of guppies on special for £1, so I picked the smallest one and it looks like a male, he has a dangler, but never say never as my platy turned from male to female so maybe his dangler is just a folded up fin.
Here is really small and his tail is in bad shape so looks like that's why it was cheap, but its certainly active in the tank and eating well considering been in the tank only 3 hours.