.If they said that everyone else with a bio lab could produce it. All the info we have is non pathogenic, meets all EU directives and non genetically engineered
My experience with cyano is that lighting spectrum is a big culprit, I have seen it only grow in areas getting direct sunlight. I have also found low flow and low oxygen levels can contribute, usually with cyano I treat with hydrogen peroxide, 1 tsp per 50 gallons per day, this seems to defeat it within 2 weeks though it may come back if the underlying cause is not resolved, lights off for 1 day will accelerate the results. I have learned dosing hydrogen peroxide is controversial but I have never had any issues, there is some discussion it can cause a toxic byproduct with iodine and bromine in the tank. I believe the Care Bacter may help, primarily by decomposing detritus it may be feeding on or that is lowering the redox and dissolved oxygen. Carbon dosing does seem to aggravate existing cyano blooms in my experience, I have some in my DSB visible on the sides though it below the surface and I have been playing with Vitamin C dosing lately and after a dose it pops up on the sand bed top.
I didn't purchase it for cyano. I purchased for the algae I haven't been able to get rid of. My lighting is pretty blue with the spectrum I run my kessils at. The tank doesn't get a ton of sunlight and there's a lot of flow. In keeping mixed reefs for nearly 20 years, I've never had one give me this much trouble. I thought it was interesting the cyano quickly started to go away. My coral didn't care about the product landing on it. I too thought it cleared up quickly and had no issues once my skimmer came back on...
It might help with cyano but I am skeptical, I think it has the most benefit against some hair algaes and green algae. The basic idea is algae and bacteria compete for the same nutrients, in a new tank the bacteria are not well established so the equilibrium shifts to algae doing this job, we shift it back to bacteria and the algae starve. The issue with cyano is it doesn't have the same limits as algae, it can fix nitrogen, it is a bacteria and not an algae. Most cyano remedies are going to be an oxidizer to raise redox or a antibacterial product (antibiotic). I have good luck with limiting light and using hydrogen peroxide and increasing skimming/ flow (make sure everything is clean and working optimally, if something is suspect or questionable for the job, replace it with a better one).
I'm in week 3 where the algae starts to look "worse" before it gets better...It's making me a bit nervous but if it goes away it's definitely a worth while product...
My experience was it took 6 weeks and it got worse before it got better. However, I have no way of knowing if in 6 weeks it would have gone away on its own or if my shotgun approach something else or the combination effected a remedy. In my tank I had an algae that looked like derbasia but was brown, I so no results weeks 1 and 2 other than clearer water, less film on the glass and no piles of detritus, weeks 3 and 4 the algae growth accelerated, week 5 it stopped, week 6 right after the dose, the next day it was just completely gone.