Do you play Gran Truismo ? Then Yes, We are best friends ha ha.

I did not see where he suggested you not “cycling” a quarantine tank. You should “cycle” most tanks, regardless of use. What is likely happening here (I’m taking an educated guess): they are doing what’s called a “fish in cycle”, where they’re going to dose the tank with a bottle of beneficial bacteria before adding the fish to the quarantine system. And then water change it, if they test and see ammonia rising, or if the ammonia badge detects ammonia and alerts them. And they will simply allow the nitrifying bacteria to colonize the system through the first quarantine process. And you can do a “fish in cycle” on a brand-new reef tank, before all but a few hardy fish are added. However, there are situations where you don’t cycle a quarantine system. And those are specifically forms of treatment for certain infections. there are some medications that kill bacteria, including nitrifying bacteria. So, in those tanks, you can’t “cycle” them. You have to keep changing the water daily or every other day at the most. There are also methodologies like the tank transfer method for dealing with Ich which specifically revolves around moving the fish to a new tank every 36-48 hours, which exploits the life cycle of the Ich parasite. By new, I mean drained, disinfected, cleaned, and new salt water. Now, that IS NOT the method being discussed here. And you should read about it separately for a deeper understanding. It's also notable that copper does not kill nitrifying bacteria, so you can leave a copper-only prophylactic tank running long-term, and just dilute them back to low Cu concentrations when you get a new fish. Cycle it once, and it’s good. The other part of your question is that a functional Reef Tank needs far more establishment than just “the cycle”. Reef Tanks have very diverse microbial ecologies of which nitrifier's make up only a part. And establishing nitrifier's is just the first step in a long line of ecological succession, often called “the ugly stage”. It was a good question, hope that helps.

He said you add water, you add salt, you add fish and then bacteria, no cycling

I’m in Canada and copper power is available on Amazon, is it a general treat all just encase medication?

@@Kenny_Edmonton Copper kills most inverts, it can me used for QT or to treat a fish only tank with certain outbreaks. Some fish dont do well in copper and best to ramp up. Its toxic so other then QT not good to do it just to do it.

20-25 days. Some diseases take a while to either develop or go away

Not the first word on heating.

When used improperly copper can harm fish. I’ve used it for 12+ years with no problem. Some of my fish that have been with me for 10+ years went through copper treatment w/out issue