I have had my 12 gallon nano dx for the past four months and things, with the exception of a minor glitch or two, have been going well. In the last few days, I have noticed some changes.
I change water weekly, approximately 10 - 20 percent each time. I have the normal pump and an additional nano power head to add additional circulation. I use a Stevie T rack with purigen, chem-pure and floss in chamber 1, charcoal in the second chamber and have the pump and heater in the last.
I noticed over the last couple of days that my fan sponge seems to be losing it's brightness and "denseness," while one heady of my torch tip coral seems to be retracting and looking pretty ill. I also have one group of zoas that have closed and don't want to open, while another group seems to be flourishing. All the while, I have mushrooms that look awesome, and feather duster that is doing fine, and two groups of star polyps that are also doing well. I also have a birdsnest coral that is doing fine at the top.
I have three fish, a percula, a watchman and fire fish. I also have a CUC with 2 emeralds, a fire shrimp, 3 hermits, 2 nassarius snails and 2 turbo snails.
. Water tested as of this email.
Nitrate 10 - 20 (THE HIGHEST I HAVE EVER SEEN IT)
These were the result of an API liquid drop test.
Any ideas on why the sudden spike in Nitrates? Any suggested plan of action? The only thing that I can see with my very limited experience is the rise of nitrates causing some of my corals to be unhappy?
Any and all help would be greatly appreciated.