I have two pair of discus. My other pair eat their fry occassionally but was successful; this newer pair eat theirs all the time just when they are ready to swim they eat them up. The water para's are good. They are in a 55 gallon tank with another discus which is separated from them and a algae eater other than that everything is good. Maybe put them an no gravel or plants tank? Thanks for the info. Sportsnutim