Here is a good article on bloat for africnas. Seem like it works pretty good.
http://www.thecichlidgallery.com/article_bloat.htm
http://www.thecichlidgallery.com/article_bloat.htm
I STARTED MY LOVE FOR TANGS WITH TROPHEUS!I HAD OVER 8 DIFFERENT TROPHEUS FROM MPULUNGU TO KAISERS.ALL I HAVE LEFT IS MY MOLIRO RED!I LOST THEM ALL OVER A 6 MONTH TIME PERIOD TO BLOAT .THEY WOOULD DIE BY THE BUNCH.TRIED THE CLOUT PROCEDURE BUT MOST OF THE TIME IT WAS TOO LATE AND STRESSED OTHER FISH IN TANK.THIS MADE ME GIVE UP ON TROPHEUS.I TRIED EVERYTHING SPECIALLY FOOD (VEGGIE)AND PERFECT WATER CONDITIONS BUT STILL NO LCK!I THINK THE ONLY PATTERN I NOTICED OF THEIR BLOAT DEATH WAS WHEN THEY WERE MATURING AND HAD TO COMPETE WITH OTHER MALES AND THE WEAKEST WOULD DIE!IN THE FUTURE IF I WERE TO TRY IT AGAIN I THINK I WOULD HAVE COLONIES OF JUST ONE KIND OF TROPHEUS IN A BIG TANK.THE REASON I SAY THIS IS BECAUSE THE TANK I HAD ALL MY TROPHEUS WAS A MIXTURE OFF ALL KINDS OF TANGS.