Hello,
I'm new to the forum. I'm having some problems with my fish. I have a 20 gallon tank that has been up and running since this April. It houses 4 Tiger Barbs, 2 Long Skirt Tetras, 3 Neon Tetras, 2 Mollies, 3 adult Platies and 8 plus Platy fry. Several of my fish have been getting sick and...