I have been skeptical about bacteria products for a long time. I haven't seen any reason to believe that BioSpira adds anything of value, especially when the tank has a bit of real live rock in it. Personally, I wouldn't bother. The reports we read here on its effectiveness are highly variable, and consistent with a placebo.
I don't personally see a need for or clear record of benefit for bottled bacterial products;so I don't use them.
Well, we don't know how long the cycling process would take in the absence of the additive. Someone would need to do a controlled study of a reasonable population size to tell us what's happening. Could such products reduce the time required to get to zero ammonia. Maybe. Is there evidence that they work. No.For me, I used dead rock (made it myself) and "live sand" that was fairly old (CaribSea Fuji Pink but sat in my cupboard for 6+ months). Based on my testing, I think Bio-Spira cut about 2 weeks of the cycle.
Well, we don't know how long the cycling process would take in the absence of the additive. Someone would need to do a controlled study of a reasonable population size to tell us what's happening. Could such products reduce the time required to get to zero ammonia. Maybe. Is there evidence that they work. No.
Definitely agree. I don't have a lab and I'm not doing a scientific study. However, going from "not yet processing ammonia" to "processing ammonia to nitrite" efficiently in a day or so leads me to make a reasonable assumption that the bottle saved some time. I never got an ammonia spike. I'll take my empirical evidence over conjecture that it does nothing. But I agree just how much it does is subject for debate. It would be great to see some scientific testing on these products including testing it against the products recommended for seeding sanitation fields (that some hobbyists have used in aquariums).