I would recommend against adding another male to the tank. If he is so amorous that he wouldn't leave your female alone, he will not discriminate against amplexing with another male. He will bother a new frog just as much as your female. Trust me... I have a male just like yours. He will grab onto anyone regardless of gender. My females are so much larger that he actually prefers to get on my smaller male. The females have so far not laid any eggs (which is almost a shame since the male is a very handsome albino reticulated). Just as well though, there aren't enough home for all the babies he would make. Unless you can provide a tank large enough for a group of 4-6 frogs, I would keep your male alone. The only reason that I still keep my crazy male with others is because he has 5 other frogs to pester instead of focusing on just one.