Burto;4795990; said:What are your water parameters? If your ammonia and nitrite are at 0, you've got enough filtration and more isn't going to make a difference. Do you have water clarity issues?
That said, if you want to spend $220+ on something you don't need, an FX5 is an excellent filter.
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Burto has a great point here..... get some test kits and test your water.
This is the first thing I thought of as well when I read the original post, looks like Burto and Burtess think alike lol....

Burt