Cloudy water
by Mike
(Maple Grove, MN )
When I first purchased my XP4 filter it made my otherwise cloudy aquarium crystal clear (150 gal). I was very impressed. It has failed since the first cleaning of the filter to repeat the performance. I've tried duplicating the setup that worked, I've tried new filter media, I've tried adding additional filter elements, I've added chemicals to the water, and the water just gets cloudier each day.
My current combination is 4 foam pads, 3 micro pads, 1 progressive micro pad, Rena Crystal, and biological media. Water flow on the return is pretty strong and every 2 weeks the micro pads are dirty but it cannot produce clear water.
What do you suppose changed? I want it to do what it did when I originally installed the filter. I'm using an XP4 on a 150 gal tank and cleaning the filter every 2 weeks.
Today it is so cloudy I cannot see the back of the tank and I cleaned the filter just 4 days ago.
A: It must be something in the water reacting to something in the filter. I have another customer in Minnesota with the exact same problem. One thing that does does jump out is the constant changing of media. Sometimes, this does not allow the tank to "cycle". If you are not familiar with the term "cycle" as it relates to aquariums you might need to work with someone locally to get better results for water clarity. I wonder if you have ever had the water tested for things like nitrates, phosphates, pH, hardness, etc? If not, take a sample into a good aquatics store with someone that knows water chemistry and get it tested. This can reveal a lot. Hopefully, someone else will have additional ideas. Also, be sure to review similar Q&A's in the Rena Filstar XP Performance section .