Hi Chris and welcome.
How big is your planned tank for growing 10 baby discus ?
Is it going to BB growout by the book or do you plan sand , plants and decor in it too ?
No one can tell for sure , but I think that you might have problems with microbubbles and outgassing the new water at 200% daily rate . That's a fast rate of adding new water and I'm not sure if you'll be able to outgass it even with very strong surface movement .
What about dechloration ? Is it going to be a straight tap or do you plan to dechlor via Carbon blocks or RO units ?
What about the temp. of your added water , is it going to be adjusted to 82-84 F before it enters the tank ?
About having the addiction thats paying for it's self , it sound like a sweet idea , but many experiences shared here says that investments in finance and time growing discus often exceed the earnings .