Fry Overload! And Moving To Main Tank

I have had a guppy fry overload! I currently have 2 6 week olds and 8 3 week olds in a tank downstairs and had another 8 born this week that are in a breeder box in main tank. I want to relocate the 2 oldest to the main tank and put the 8 newborns downstairs. There are 1 male and 3 female guppies and 4 white clouds in the main tank. Would the 6 week olds be ok in the main tank? I'm sure they are too big to eat but guessing they are not going to like it

Heres a pic of the babies

 

I think adding them to a tank at that size would be okay, just provide lots of cover to help them feel less stressed.

 

I think they will be ok, but I teach me your secrets
I'm breeding guppies and ive had my tank for a few months and I only have 2 fry. They may be getting eaten, I just leave the fry in the tank.

 

They have got on great doubled in size and not scared of the bigger fish I don't leave them in the main tank I rescue them .... maybe that's the problem lol

 

If you have plenty of cover in the main tank, you would be surprised how many fry can survive.

 

I don't like the thought of any getting eaten currently got 2 oldest in main tank as two females died and I could sex them and 25 in the fry tank thankfully no births in past few weeks, now just worrying about my goldfish.... its a never ending cycle

 

That's where plants come into play. Floating water wisteria at the surface will give the fry places to hide. Even a good mature piece of Java Fern tied down to a piece of driftwood or rock will give plenty of hiding spots. The root system is where the larger fish really can't get to the fry.