I have been looking at geting filters for my 90 gallon and have almost decided on the cascade 1000. After reading a bunch of reviews I hear a lot of great things. The one bad thing I hear is the 1200 and 1500 alow for a lot of bypass. That is why I am thinking of getting two 1000's I hear there is very little if any bybass from them. So does anyone have any bad experiances with this model of this brand? Thanks for your time.