JD7.62;544185; said:If your tank has only been setup a month with zero nitrates and only one water change your tank is not cycled regardless of filtration as filtration actually produces nitrates and does NOT remove them. Im not familiar with that purigen, but it most work really well for there not to be any nitrates and only one water change in a month! You did cycle your tank properly didnt you?
the tank has been set up a year but he has only done 1 waterchange a month ago from what i understand my tank never reads nitrates but i know there is...