I keep seeing these yellow balls on my substrate. I first thought it was out of the Colombo root tabs capsules that I buried because the Kribebsis has been digging. However, I keep seeing more of them. They also look too big to be from the capsules. Is there a possibility that they could be seeds from any of my plants? The plants I have are echinodorus ozelot and Reni, rotala rotundifolia, bacopa carolinia, lobelia cardinalis, java fern, Anubias nana and petite, cryptocoryne usteriana, bucephalandra.