What a great post! I’m going to start doing this... thank you, RD for the well researched information.
Hello; had a similar experience first time I used RID-X. I did not like adding the bulk materials. This is what I have tried.Rid-X in my 38 gallon by putting it in a fish net in front of a powerhead for a few hours. Every time I shook the net, small white pieces would fall through and now my substrate looks dusted. I'm assuming that's just very small particles of the wheat bran carrier and that the bacteria itself isn't visible? Will probably get a finer material to hold the bran next time.