It should grow back as long as your tank has pristine condions. Just in case you have not seen this link.
'Bubble' Alage: Selected Descriptions, Controls and Comments by Horge Cortes-Jorge, Jr. - Reefkeeping.com
Getting livestock to take care of algea is a bandaid solution. Check out this checklist and find out what`s fueling it.
FantasyReef Databases-Viewing item "10 Step Plan for Nuisance Algae Control"
First of all garlic does nothing to get rid of ich
Garlic: What has been Studied Versus What has been Claimed by Steven Pro - Reefkeeping.com
Read these for great info on the parasite.
An Ounce of Prevention is Worth a Pound of Cure: A Quarantine Tank for Everything by Steven Pro -...
The only thing I could find out that LA says " If incorporating them in small groups or pairs they will need to be introduced to the aquarium simultaneously. "
I feed my tank every other day. On the off days I put a sheet of dried seaweed in the tank for my tangs. Been doing this for 12 yrs now. The fish in my tank have been there between 8-12 yrs now. Variety is always a key.