Uv light

It's been a week and a half and the ick spread to my other fish that's what has me worried! I know tangs are known to get ick easily

 

that would be true if that was the only fish showing ick but he said his other fish are showing it as well...i know for a fact my system has ick in it because when i added one of my fish it showed for the first few days but the tank is healthy enough and not overcrowded so it doesnt show anymore....when ick is showing on multiple fish it is usually a sign that the conditions in the tank arent up to par for the amount of fish in the system etc and in that case i would treat the fish....if it stays hidden i say leave it alone but if showing i would vote for treatment

also another sign on whether or not to treat is to see if the fish are eating well if not they should be treated

 

The tanks very healthy never had any issues the tank has a 2" Niger trigger, 2-3" Picasso trigger, 4" lion little lunar wrasse 2 domino damsels water paeans are
Nitrates 0
Nitrites 0
Phosphates 0
Salinity 1.20

 

what size tank could be overpopulation, plus some of those fish are agressive so just them going at each other is enough to stress each other out and show signs of ick, also be careful with that lion...as he grows he'll eat anything that will fit in his mouth and its not unheard of for lions to choke becase they try to eat something bigger than they can fit down their throat...lions should kind of be in a species tank but some have found success other wise, talk to incognito he has multiple lions(possibly 1 of every kind) and he knows a lot about them

 

you didnt list PH and ammonia

oh and phosphates dont mean anything toward a fishes health...just affects the growth of algae, you dont really need to test for it unless you're having an issue

 

imo the uv will help with the free floating ich and give your fish a better chance to fight the ich. i had ich in my tank a year ago. i have a uv, all i did was pull the fish that had ich fresh water dip it, than put it back into the tank. i pulled the fish one day than waited 2 days and pulled it again repeated the dip . after that it was fine no signs of ich and all was well. when i did this i floated the fish in a clear container of fresh water in the tank so it could see its home. i feel this cuts the stress a bit, i tried to cut the stress to it as much as possible. water temp and ph was the same as in the tank.
this is how i handled it. which worked well for me. oh i also started soaking the fishes food in selcon.
and as far as I'm concerned save your money on the garlic...garlic doesn't do a thing but stink.
if you do go for a uv, don't go cheap research them, they all don't have the same water contact time with the light, and some need their bulbs replaced sooner than others. check ebay once you know what you want, you can almost always find deals on them on there. since people by used tanks and don't believe in uv,s and end up selling them cheap.
for me i believe they work and won't shut mine down. this is my second tank and both had a uv on them. and i had a tang's in my first tank.

 

This is a 92 gallon now front with a 20-30 gallon sump so it's not a over population issue I have never seen any of my fish be aggressive towards each other my amonia is also 0 just forgot about that one ph is at 8.2
Ive had the same fish in there for 3 years never showed any signs of ick or aggression. I added the tang from my buddy's tank and it must have got stressed out furring the move and two days after it was introduced it showed signs of ick so I feed garlic focus and metro for a week and a half now. Now last night the other fish are showing and the tang has it all over

 

just looked up the dimensions on that tank and its only 36" long? with all due respect even if you treat the tang and other fish you will more than likely keep having issues because plain and simple that tank is not long enough, im not the tang police but hippo tangs get to be 14"+ and really shouldnt be kept in a tank any less than 6' even if still small since they are distance swimmers the tank height/volume really isnt that much of the issue it needs the length...i have a 4' tank and i constantly get asked by my gf/siblings why i dont have a dory and i tell them the same reason....you're not going to like this part but in my opinion after you finish treating everyone i would maybe look for a new home on that tang maybe trade him in a local fish club for another fish like a dwarf angel or something along those lines, I'm sorry but its in the best interest of the fish but the final decision is up to you

I'm sorry if i got the tank dimensions wrong but thats what I found online

on another note whether or not a tank is heavily stocked doesnt really matter on the number of fish, but their compatibility and shared territory with one another...one person may be able to fit 15 well thought out fish in a 92 while others can only put say 3 or 4, do you mind me asking what you're current stock is and how much LR etc?

also last thing aggression isnt only shown by fish physically nipping or chasing one another....other forms of agression could be body language to intimidate one another(raised fins, violent vibrations, change in color, etc), also agression while feeding is another issue when fish are out competing one another.

in the end in this instance i would treat the fish if all or most fish are showing signs of ick and once treated i would rehome the tang...my tank at home has ick and there is no signs of it in the tank currently and has been that way for a while so in my case i wouldn't treat on my own current tank

 

agreed i believe this is why I'm able to keep so many fish happy and healthy in my small tank.

but a uv will help you. not sure if its going to help with whats started but it will help in the future. its also better for you its kills bacteria in the water that is dangerous to you.

 

i agree with that, but it wont rid the tank of ick...either you can ride it out and see how your fish take to it or treat but usually by time you ride it out long enough its too late :/