sailfin tang with white spots

[Lyds]

Hi I have a 55 gallon tang with sailfin tang, lunar wrasse, 2 clowns, coral banded shrimp, zooantifs and clam
My sailfin tang has had spots on him since I got him about a month ago and a couple of big spots sticking out from him fish store said could be a bacteria or fungus so I've been feeding him pellets soaked in tetracycline the white spots are still on his fins I don't know if it's ick and how I can get rid of it i've tried giving him freshwater dips and it's not helping
I added the two clowns yesterday and today I noticed the big clown is getting some spots I don't know what to do
This has happened before with a yellow tang and a clown I had and they both died

 

[cmor1701d]

First thing to do is set up a QT/Hospital tank.
Please post a photo if possble so we can see what the spots look like. Ich looks like grains of salt, and could be anywhere. On the tang look at the fins and around the gills.

Big white spots sounds like a fungus.

How big is the fish?
It belongs in a 100 gallon minimum tank.

Quarantine article

An Ounce of Prevention is Worth a Pound of Cure: A Quarantine Tank for Everything by Steven Pro

 

[MississippiFishGuy]

My sailfin had got a few small white spots a while back. I just feed him sea weed that was dipped in garlic medicine and a few days of that got him all better. You should be able to get it at your LFS. O yea I still feed my Tangs the garlic dipped sea weed just to be safe they both have been healthy since I got them.

 

[Zer0]

Doesn't matter. The ich parasite is still in your tank, and is still in your fish. All the garlic does is boost the fishes immune system, and allows it to keep fighting the cryptocaryon parasite. If you stop feeding your Tangs/fish that garlic soaked food, i bet your tank will go south very quickly. Unfortunately..