I'd say TTM is riskier. There's no guarantee you won't accidentally transfer some theronts with the fish, and some flukes can be stubborn enough to need more than 2 doses of prazi. But you wouldn't know that if you don't observe the fish for long enough.
And honestly, I avoid transferring some species, like tilefish, unless it's absolutely necessary. No matter what I use, net, scoop or even my hand, they completely freak out and risk injuring themselves every time. I would never consider TTM for them. I've also had wrasses get stressed from having to dig them out of the sand for transfers, so the whole thing just sounds really stressful to me.
On top of that, feeding 4 times a day to fatten fish up with no biofilter? While dosing NFG which essentially killed off my biofilter, my ammonia has been climbing by about 1 ppm per day and I've barely been able to keep up. I honestly don't know how people manage TTM unless they're barely feeding during that period...
I really think copper is the easier route. You just test the copper level once a day and adjust it if needed. No stress if you're late by a day, no need to catch and transfer the fish every few days, and no need to sterilize everything each time.
I also use a preseeded sponge from my DT, so the quarantine tank is instantly cycled. With that setup, I usually only do two 50% water changes per week, sometimes less. I've never had to worry about ammonia.
Plus, those 30 days are beneficial too. They give me plenty of time to fatten the fish up, observe its behavior and make sure it's healthy before it goes into my DT. I don't really see a reason to shorten that period and risk anything getting through...
Talk about fat, my new yellow is putting on a belly! I can’t stand places that don’t feed enough. And I get it, when it comes to LFS’s. Feel like some just don’t care out side of money. I would not be able to run a LFS. At least I don’t think haha. I would try to fix all fish that have issues. Haha.
This when I got him/her
And now you can see it plump up.
any hint of blue in lights and the yellow on these fish just vanishes so easy haha.
