I think in some ways reefing is much harder now than when I started in the 70s. Not in all ways because now there is information and then there was none. But I believe that no information is better than wrong or even damaging information and today we have IMO a lot more wrong information than correct information.
That is not anyone's fault but much of this hobby is done by people with very little experience of a couple of years and may have only had a problem once with a particular fish, disease, pest etc. and give their advice which may have worked once or may have not worked at all but the problem went away on it's own as most of these "problems" do and that information is passed around as fact.
Five years is not even half the lifespan of a hermit crab.
We still have people advising to use cleaner shrimp to control ich. Thats great if you believe that, but you are wrong, sorry it is bad advice and I would rather not argue about it. People have been doing that for 45 years. Including in the beginning, myself.
Yes I know, many people put in a shrimp, the ich went away so the shrimp cured the fish.
Thats like saying you washed your car and the ich went away so car washing is the secret. It is not.
Other people squirt hydrogen peroxide on hair algae, or throw in a sea hair and the algae went away.
(Algae goes away on it's own most of the time no matter what you do. ) Shoot me.
Anyway, if you can find a cure or remedy and it works "most" of the time for 15 or 20 years, then maybe you have something. The Vast majority of these "cures and remedies" that some people come up with have been used many many times since the hobby started in 1971. I think it was on a Tuesday about 2:00 or 2:15 in the afternoon on a cold, windy day in March.
If they worked, thats what everyone would do.
If you have a problem or question about something, I think the best advice would be to find someone with an old tank (old is not 5 years) and ask them questions as to what they would do.
PM them or read their threads as there are many old, healthy tanks especially on this forum.
I would not take advice from someone who posts that they have been having "Great Success" doing something and you find out they started in the hobby last Tuesday.
Remember most fish can go for months without even eating so it is hard to tell the health or needs of some creatures unless you have been caring for them for a few years.