Congrats
If you're using gravel as a substrate in the 10 gallon fry tank, you should cover it with marbles because the fry might get trapped and crushed in the gravel(

!). Well that also means that food will easily slip in the marble! So do regular vacuuming of the gravel(careful not to suck in any fry!)
A good filter for the fry tank is a sponge filter or a box filter. They are usually inexpensive. These filters are very good at rearing fry, preventing them to get sucked into the filter.
Oh and be sure your fry tank has cycled!

Just get old filter media from your main tank and put it in the filter of the fry tank. That way, your fry tank will be cycled in less than a day or two.
Good luck!