I had a Cascade 1500 on my 175 gal
tank and it gradually lost volume for some unknow reason. I cleaned it, cleaned to lines, no joy.
I went to Big Al's here in Edmonton and got two of the biggest Rena's (can't remember the number) to replace the one big Cascade. Rena doesn't have one rated for a tank this big, which suited me just fine. This way if one goes down or is being cleaned, there's still the other.
I agree wholeheartedly with everything that FMZ as to say in the reviews.
This is a great filter.
The reason that I write all this is because there are a couple of reviews that complained about noise.
I did have a problem with noise and the pump not working right which I think was actually my own fault.
After a couple of days running, the pump would loose prime and make a heck of a racket. I would go through all the priming steps, take the top off and make sure the tank was full and put it all back together. It would be good for a couple of days and happen again. Then today, it wouldn't restart at all. I took the lid off and emptied all the water out so I could start from scratch. It was then that I discovered that the impeller cover had come loose. The pump won't work at all if this cover is not latched. Problem solved! She fired right up!
Now I have to admit that I didn't check to see if the pump cover was seated properly when I first installed the filter and it must have been just a little loose and worked it's way off.
Just thought I'd share this with you all so if your's make a bunch of noise you can look at the pump cover first instead of sharing my frustrations.
Enjoy your tanks