No need to duck, Mike. Good question, in fact.
Now just think about what you've said for a minute.
Your beneficial bacteria won't grow when the water is down to 45 degrees -- and these are the highly aerobic bio-bugs we want and need, right?
So why would anyone think that bottled bugs, which are
not aerobic (whatever else they are), will grow any better, will become established and will get the filter going at that same prohibitive temperature?
Doesn't make any sense to me. Makes money, sure. But doesn't make sense.