Thank you so much for all of the advice! I think that I'll go with the mesh idea for four reasons-
1. I already prebought mesh in case the Plexiglas didn't work
2. With the mesh I don't have to take the fish out
3. I don't have any steel wool... :P
4. My dad is skeptical that it will work and won't buy me any... XD
But thank you so much, now I just need to get some suction cups!
Oh, and I now know for sure that both females are actually females. The boys have both made MASSIVE bubble nests for their 'girlfriends' :D