I am curious to know what everyones opinions and thoughts are on fluidized bed filters. I was thinking of building a DIY one out of acrylic to replace my junky HOB. But I wonder if it would be too much, I read One pound of sand is approximately able to handle 100 gallons of an average stocked aquarium. My fear is that it would be able to handle so much bio-load, that it would rob my plants of any nitrate and ammonia. But I have seen some articles that refer to FBF as the best choice for planted tanks, so I am a little puzzled on the subject. Maybe someone could shed some light on FBF and planted tanks.