I need advice on how to stop my electric blue acara from breeding , it was funny at first now it’s becoming a real issue , at first they had eggs then fry and two days later gone they ate them this happens about 6 times or so every 14 days . After changing my gravel to sand I knocked there pattern thought they had stopped but nearly a month after changing they have more fry so agin I leave them being the cannibal they are 4 days later ... my whole tank is living in about 1 ft of my 5ft tank looks ridiculous and I know why . Mommy and daddy have stopped eating there kids and now have decided they will Bruce Lee the life out of anything that goes by them , they have killed a Colombian tetra and badly hurt one of my geophagus . I need to stop them breeding without effect my other fish so a no go on temp .. any advice ??