I have a 75 gallon tank with 2 Jack Dempsey, 1 Oscar, 2 Pleco(1 deceased), and 1 yellow striped Raphael Catfish. For equipment I have a fluval 300 watt set at 78 degrees, a fluval u2 in tank filter, fluval c4 filter, aquaclear 50 powerhead, and a 32 watt T8 48" bulb set on a 10 hour timer. I...