Question about wet/dry filters

[bboykoi]

Is a 29 gallon wet dry filter good for a 125 gallon fish tank??
I ask this because i have one and i would always have to change the tank water every two weeks because the water would turn a into a tea color.

Do i need to add anything to the filter or is it normal?

Any good advise would help.. thanks

 

[mkman]

you change the water every two weeks? Some of us do it every week or several times a week.

 

[flowerpower]

Do you have any driftwood? What are the ammonia/nitrate levels in water? What kind of filter media do you use? Do you see and signs of stress from your fish. I know, from my own wet/dry, that if the bio filtration is too efficient, nitrate levels rise quickly. If inefficient (not enough bio-media, the water loses clarity and becomes slightly cloudy.