The last time I did add root tabs (Ozmocote Plus ones I got on here) I did not put them deep enough, and some of them opened near the surface. I thought I had pushed them down far enough and was wrong on a few of them. I removed most of the pieces that came to the surface, or buried them.
So perhaps this is the source of my problem. That was a month ago. I then moved some plants around, and probably disturbed them more.
Should I be concerned about this? Or do I just have to wait it out, doing increased water changes? Does anyone have any tips for ensuring you get them down far enough?