I was thinking of using the sump area in my wet/dry as a plant refugium. The tank is a 125 fish only with messy eating preds. The sump holds around 14 gallons operating. What are some good plants that will absorb nitrates. I was thinking that floating plants would be best in this case. Can someone suggest a type of floating plant I could use? Would I have to worry about the growth of algae by using a plant fuge?