Thought I would update those that have been helping me with this problem.
Ok... I have now removed all the filter media. I currently have a bag of Chemi Pure Elite, and bag of Perigen and some floss in my first chamber. I have Chaeto (and another macro algae I can't of the name right now. it's fern like) with a light in the second chamber and pump and heater in the third.
When I emptied out the chambers I did a water change by pumping out the bottom of the chambers to get any large debris out (there was some, but not much).
A few days after this was done I did another Nitrate test.
API showed 0 nitrates
RedSea showed nitrates thru the roof! and my newest test kit
SeaChem shows nitrates at about 20 ish.
All my corals and fish are doing well and all other water perimeters are great!
Altho.... my zoo's don't do so great. Always thought they would be the easiest to care for, but I guess I'm wrong. My newest and largest group I bought, literally shriveled up and died in 2 days!
Not sure what my problem is???
How long does it take for the Purigen and Chemi pure to start working????
I'm still doing about a 2 gallon water change, 2 times per week and still can't get my nitrates down to zero.
It's driving me nuts, as I don't plan to add anything to my tank until I get my Nitrates to ZERO!
I've followed nearly every suggestion here, but still.....
Any ideas that can help or things I'm doing wrong?