HELP: How can i prevent kribensis breeding because i want more fish in with them? 10 points for best answer!?

You can't as long as they are a pair and are in the same tank. Best idea is get rid of one. Also, you can try dither fish, like a shoal of Harlequin rasbora, to help spread aggression. I'm also positive an african erfly fish will stay away from kribs seeing as they spend time at bottom of tank and an African erfly fish spends time at top. Only thing is an ABF will eat the rasboras