Originally Posted by marcuslee80

if u r a itchy-backside person like me whom always buy fishes whenever u liked resulting in overstocking.. hydra is a a good complimentary product.. my main tank 5x2.5x2.5 was running with a 4 ft sump and 2x hydra 50 with over 20 fishes with 2 5 inch ray... all eating and water crystal clear...