How big of QT tank needed

[JCSReefing]

I am trying to figure out how people who get Ich in there DT, take all the fish out for a dormant period to let the parasite die. So I pretty sure have ich and have blue hippo tang, 4 clowns, golby, wrasse, and a blenny for fish in my 100g reef.
I want to take all the fish out for treatment for say 16wks to be sure there’s no ich in the DT Anymore and cute the fish.
My question is, obviously I cannot set up or pay for a 100g QT tank for ample space for the tang. I have a 20g tank with a 10g sump
Laying around. Can I use this? I know tangs say to never put in a small tang obviously so when people QT say a hippo tang, and others with it, what size tank is needed so they don’t die in the QT tank??

 

[Diesel]

Get a 40 breeder for the 16 weeks.

 

[nereefpat]

16 weeks is waaaayyy longer than the fallow period for ich.

Anyway, a 20gallon should work to qt those fish as long as the tang isn't huge. Watch your ammonia.

How are you treating the fish?

 

[pdxmonkeyboy]

I would say grab a 40B and an ammonia badge. 76 days is PLENTY

 

[Diesel]

16 weeks is waaaayyy longer than the fallow period for ich.

Anyway, a 20gallon should work to qt those fish as long as the tang isn't huge. Watch your ammonia.

How are you treating the fish?

Lol, I meant 6 weeks.
The OP mentioned 16 weeks as what confused me.

 

[JCSReefing]

16 weeks is waaaayyy longer than the fallow period for ich.

Anyway, a 20gallon should work to qt those fish as long as the tang isn't huge. Watch your ammonia.

How are you treating the fish?

Was thinking cupermine. Suggestions?

 

[JCSReefing]

Get a 40 breeder for the 16 weeks.

Wife would kill me setting up a 40 lol

 

[Awesome Dennis]

My wife just noticed I upgraded my QT tank from a 10gal to a 29gal LOL!.... it's been a month
She gave me the "uhhh dennis..... when did the little tank in your office get bigger?!"
Just do it, if she's going to kill you it will be when your sleeping

 

[gonzo620]

Remember is easier to ask for forgiveness than to ask for permission. Lol

 

[Awesome Dennis]

She also doesn't know I've got my eye on the SCA 150gal DT that's on sale....shhhhhh I'm working on logistics hahaha

 

[Halal Hotdog]

Do you have a substrate in your DT or is it bare bottom? How much rock do you have and can it be easily moved? Any inverts in your display? Do you have access to cholorquine phosphate?