So I'm not really getting started on a new tank or anything, but I wasn't sure where else to put this thread.
Has anyone had experience with putting play sand as a substrate in their tank and their nitrates skyrocketing? I just tested my water twice to make sure I shook the #2 bottle enough, and sure enough- I'm getting 160ppm!!! None of my tanks have EVER been that high.
-been set up for 4 years and fully cycled
-switched out gravel for (thoroughly rinsed) play sand yesterday
-during switch, I did about an 80% water change