help six line with ich

[nanoreefer]

i got a new sixline wrasse for my biocube 8g last week and he was looking realy good but afew days ago he got a white spot on his tail and now has another on his tail and one on his fin, every thing eles in the tank is fine(coral,shrimp,hermits ect)and right now there are no other fish, ive tried to get him out but hes too fast and i dont whant to rip all the rock out is there anything i can do for him? he still eats and acts fine(i feed every other day with selcon soaked mysis)i read i should add some fresh garlic juice to his food and feed him more often, dos anyone eles have some tips?

thanks