there is a perfectly good stickie in the fish room on cycling tanks - created by someone living in New Zealand, tested in New Zealand and using iitems that can be purchased in New Zealand.
While you are posting what looks to be a perfectly good link, have you tested what it suggests to see that it valid?
fish keeping,cycling in particular is done in many ways, some successful some not. When giving advice it pays to know that what one is is talking about is good advice and good advice is gained by many years of experience,, both good and bad.
In all my years of fishkeeping I look to water changes first and foremost as a solution and when ammonia is high this always works.