Andre,
No I don't have a QT tank and really believe I should. QT is so important when introducing fish into a large reef for several reasons but the main one being Ich.
From experience I will tell you what I went through for not having a QT tank. As you know I have 20 fish in my reef, 8 of which are Chromis.
Okay, as day 1 approached to add my fish you have to remember that I had a 20 gallon holding tank where all my fish were at from my two 12 gallon cubes.
They were all added in on the same day and they consisted of 2 percs, 2 yoshi gobies, 1 sixline wrasse, 1 orchid dottyback, and 1 blue damsel.
They all acclimated well into the main reef and because I had owned them for a long time ich free, they never showed any signs of illness, keeping my tank contamination free.
After 1 month I get the desire to purchase all tangs for a certain theme I want. And here is how the problems occured.
Yellow tang came first from one LFS, dropped him in no problem for one week.
I also decide on 8 blue chromis from yet another LFS and drop all of them in with positive results for two weeks no more fish.
Then I go to yet another LFS and pick up a Kole Tang and a Cheveron Tang, drop them in and no problems for another week.
Then I go back to my LFS where I purchased my yellow tang and pick up a blue tang and bring him home and cross my fingers as I drop him in, no problem for 1 week.
Wow, I say, this is fun and easy, forget QT tanks; and I decide on picking up an hawian algae blenny with again no problems at the LFS where the yellow tang and blue tang came from.
So I'm riding high with healthy fish and I fall in love with the rare tomini tang and get him at my LFS where the Cheveron and Kole came from.
I drop him in the tank and in two days I notice some white mucous on his side and dismiss it as a small scratch; THEN ON THE NEXT DAY MY EYES ARE WIDE OPEN AS MY WIFE SAYS, HONEY LOOK AT YOUR BLUE TANG HE IS SCRATCHING AND FULL OF WHITE DOTS.
Oh no, ich has been introduced into my tank and then I see the algae blenny scracthing as well, then the six line starts to scratch.
I then research on the internet all types of remedies and decide I will go with NO ICH medicine along with some cleaner shrimp. I had used the NO ICH in the past with some good results.
So I go and make the purchase as I'm not letting any days advance on my reef with the ICH. I shut off the skimmer and remove my carbons and I dose as per instructions until the medicine is gone.
Then I go and puchase another bottle and dose hard again untill the bottle is empty; I also raise the temp in my tank to 83 degrees from my usual 77 degrees to have the ich go through it's stages quicker.
I also feed heavily flakes dozed with garlic and pellets that build on the immune system, I am to keep these guys fat and give there bodies a good chance on fighting the ich.
And all my fish have appetites like you wouldn't believe including the ich infested blue tang; he's eating like crazy and itching like crazy.
So I take off to Orange County on Thanksgiving and my wife says I bet when we come back the blue tang is dead.
We come back with from vacation 4 days later and all are swimming and happy eating and looking better. The blue tang goes through three more outbreaks of ich but each one is smaller and smaller and he seems to be dealing with it good.
My brother had given me his two black ocelleris clowns and I drop them in and remove my other two clowns; and the larger female develops a small white dot on top of her dorsal fin.
But I feed heavily and she eats and eats and it goes away completely within one week.
Today my tank is ich free of symptoms and all my fish are pigs and healthy as can be. It was amazing that none of my other tangs ever developed ich during the outbreak.
What I did learn is that the meds that are out for reef tanks do not kill ich, they just boost the immune system of the fish, giving them a better resistance against the ich outbreak.
Copper is the only real proven med that will kill ich.
My fish stayed healthy because I was on top of them during the outbreak, but it was a lot of heahache and having gone through that would recommend a simple but unique QT if you are going to add a lot of fish like me.
I hope this was informative for you Andre,
Mike G