Good bacteria does not create any bad type of spike. It is a probiotic good bacteria for tanks. Won't spike anything it should actually keep the crazy ammonia spikes associated with disturbing the substrate. I have feed bio plus for a year now and have great luck with it. Got some after I found out nick used it, I do also fee ei and bebi too
I was actually wondering what the difference between Ei, Bebi & bio plus was. Or if there is one. But you feed all of them so there must be?