I've got mixed feelings about using bacteria in a bottle.
There's something to be said for allowing the biological filtration to "establish" on it's own, in it own time, according to the amount of ammonium ions produced from either "cycling" fish, or die off from live rock. This to me is the best way. The biological filtration, be it sandbed, live rock, bioballs, biowheel or filter floss becomes populated by beneficial bacteria naturally. They respond to the amount of "fuel" they have, reproduce and become the basis for future nitrogen compound conversion.
Solid - Tested - True
Bacteria in a bottle .... well I still don't know about this stuff. Take a tank, fill it with saltwater, heat it up, and start dumping in various strains of bacteria all at once.
Are they alive in the bottle ?
Are they dorment ?
Are they dead ?
Is there an immediate fuel source for them when they hit the water, or do they wait until some ammonium or nitrite is there to feast on ?
I don't know - seems sort of silly to me to spend money on bacteria, not the first time I've said that here, but it does seem silly.
We always want stuff to happen so fast.
Get out of my way, get going, why are we waiting so long, quick fast hurried results, much like the rest of our lives lately.
But my feelings are let it be .... let the bacteria respond and reproduce as they were designed ( or have evolved ) to do, and let the system's biological filtration become what it will become.
A cycling tank is the first test of our level of patience.
Patience many times = success