Beginner needs help !

Not necessarily true. Clowns are members of the damsel family, but IME, I've found damsels to be hardier, but it can depend on the specific fish too, and it's health when you buy it.

It may be necessary to dose, so saying to not add anything is not good advice. If I didn't add anything to my tank, my corals would stop growing and probably die.

Agreed.

Generally, it's good to quarantine, but sometime it's not practical to do so. Especially when you have a small tank, it's basically setting up an identical tank to just quarantine. And, I've found it's very impractical to quarantine larger fish as you will need a much larger setup. If you know how to buy healthy livestock and know what to look for, you keep your water as clean as possible and practice good husbandry skills, then you should be fine.

I think your statement, while with the best intentions, adds confusion to the issue as stating you can't treat the DT for anything or the fish will die is a little bit of an exaggeration. That's not entirely true and as eluded to above, it's possible to deal with diseases such as ich in more manageable ways instead of just medicating the tank.

 

This is why I always find this hobby absolutely fascinating.

Our personal experiences can vary so much, it’s really true words “what works for one may or may not work for another”. I too have found Damsels to be just about the hardiest damn things out there – I also have found them to be over aggressive bullies that are often regretted down the road. Clowns are hardy as well, and if you get yourself a Tomato Clown you will find it’s a whole lot like a Damsel as GM said.

Quarantining is simply good business – I have never done it myself, but good procedure if you have the means.

Most importantly I completely agree with GM – stating that you can’t treat the DT is just not a true statement. I ask you to come back and put some parameters around that statement, I think I know what you were trying to say but don’t want to put words in your mouth so I’ll hold off yet.

 

i agree; start with damsels; very hardy fish. clownfish work too (they technically r damsels). the most hardy i believe is the maroon, but the ocellaris could work too

 

The first post in responce was spot on- stop, and let the tank run a while, no more fish- leave the CUC (clean up crew) you bought and let the system do it's thing for a month or so.

Yellow tail damsels are great starter fish, however, they are mean lil' suckers and very much territorial- hence why I agree with the first post. Patience will pay off in time, because, then you wont need to buy such fish and you can by "nano" type fish that you actually prefer, all be it damsels are cool fish sometimes.

If I may ask, did the person whom sold you these fish offer any advice concerning their care and habbitat requirements?

If not, avoid this LFS (Live fish store) and spend your money else where.

Ask questions before you purchase, most time you will get good advice.

IMHO.

Good luck and I hope you stick with it- it's a very rewarding hobbie.