I recently replaced my Cascade 400 filter with a Cascade 600 filter. The new filter's GPH is three times that of the amount of water I typically put in the tank.
About a week ago, I needed to do one of those occasional big deal cleaning jobs on the turtle tank (the one that my pair, Hurricane and Typhoon share). I had to change about 80 to 85% of the water. Naturally, after I put the filter back in the tank it had to start working on the nitrogen cycle again after not really being able to complete a full cycle as well as it needs to. I have smelled the water, and it does not smell foul or like turtle pee.
My mother insists that there is something wrong with the filter because the water is cloudy. Over the years when we have had to to large water changes, she has complained about cloudy water, and then it clears up on it's own. I have read the directions, and the filter sounds and looks like it is working fine. I know, and you guys know that it is perfectly normal for the water to be cloudy after a large water change. If you could reinforce this, that would be a huge help, because it seems like just my explanation isn't working for her.


