I just answered in another of your posts asking a lot of the same questions plus you also stated you have a Geophagus surinamensis in the tank as well.
Not harping here but you need to know at least your ammonia, nitrite, nitrate, and ph. A lot of things could be causing the haze. If ph is at 6.5 biological activity in a tank slows, in a ph of 6 biological activity stops and BB begins to die off. So you need to see where your ph is for starters. If it's too low that can trigger ammonia to rise.
You could have a bacterial bloom. One way to know if it's a bacterial bloom is to do a 50% WC and see if the tank clouds up again within a few hours. If it does then your having a bacterial bloom.
How long has the tank been set up and did you do a fish in or fishless cycle? If you didn't cycle the tank and just added fish, depending on how long the tank has been set up again you could be having a bacterial bloom. You need to provide a lot more information.
As for the filter, it's fine for the tank. As already stated as long as the outflow isn't blowing fish around the tank extra filtration is a good thing. I've been in the hobby over 30 years and always have a lot of filtration. You simply can't compare a closed tank system to outside water sources such as lakes and oceans. Filtration also has nothing to do with cycling other than providing a place for bio-media.
I do a weekly WC of 50% on all my tanks and water is pristine and crystal clear. I have tanks ranging in size from 6g up to 220g all planted. WC's are not responsible for cloudy water. In your other thread I asked how much water are you changing out with each water change?
In your other post your having fish behaving oddly which can have a lot to do with what is causing your cloudy water. You should ask the mod's to combine both threads.