Pretty awesome ! I’m really waiting for nitrites to drop already .I was planning a tank move due to a house sale over a decade ago... someone mentioned this stuff to me. I dismissed it to at first, but then started to research it a bit, and found that a lot of folks had great results with it.
I purchased the stuff with the intent of an orderly transition from our temporary housing (condo) to the new house. That didn't happen because the ****** landlord shut off the electricity one day after we took out our main belongings (a few things remained, including the still operating reef tank).
Fortunately, I had the new tank set up (just salt water and nothing else) and the temp at the condo hadn't got too cold yet.
So, that cold early February night I rushed through the process of bringing over to the new tank. I added the BioSpira and literally just put everything in... rock, fish Corals. Floated them and nothing else. No cycle time for the tank.
The results were pleasing... 100% survival of fish and coral, including LPS and SPS. The advantage was that I added livestock with no wait for a cycle.... and in this case any wait would have been fatal.
I will add that this was in February 2005... have not used the product since. Also, just for the record, tank has remained up and running since then, and at least 3 of those fish are still with me.