I have a 29 Gallon tank with a 3 inch Tinfoil Barb, 6 inch Kissing Gourami, full-grown Male Opaline Gourami, Pleco, Rainbow, 2 Mollys, Mosquito, and another small kissing Gourami. The problem im having is that some of my fish are turning up dead. I found my MOLLY inside my swordplant and she was...