I started an aquaponics system because I wanted a fish tank, and thought it would be a great way to keep my fish happy and healthy, and get some free veggies too. I have a 10 gallon tank with two platies (just had a Molly die off, I'm going to get some more friends soon). The only thing I've been able to keep alive is an incredibly hardy Rosemary plant. All three of my mollies died of swim bladder disorder, and I think one of my platies has ich. I'm really disheartened by what's happening, I just want my fish to be happy. Any advice?