Hey again DS :)
You could do that but i think changeing the water and then putting them together has a much better affect. Plus that one to two days will just make it need to be cleaned a lot faster after the fry are here. And trust me cleaning with new fry is very stressful.

Good Luck,
Astro

Hello again Astro277, could I do a 100% water change on the spawning tank 1-2 days before the initial introduction?

Thanks for helping me!!!

- Dead Sunlight