Ich Problem Lost all fish but 4 (going fallow)

Hi fellow reefers I have been reading and reading about ich for the last 2 weeks now... and im sooo confused... my story is simple (i think) have a 125G with 30g sump , skimmer , 2 200w heaters and chaeto.. i have alot of coral hammers , frogspawns, montis, acans, bubbles , starpolys , zoos alot of other coral... also had (i repeat had) over 20 fish... i went one day 2 weeks ago and bought 3 new fish achilles tang , yellow tang and chocolate tang... well ich was introduced into my system apparently because 3 days after the fish were in everybody got ich... all but 2 chromys 1 red cardinal bangi and 1 rabbitfish (that has cloudy eye now) i have lost over 3k including 2 breeding pairs of clownfish, i would say the last 2 and half weeks im devastated now and been treating my tank with all sorts of things like ginger , garlic, did rally with kick ich , water changes ,blah blah blah... tried it all... so my question is basically... do i try and leave the current 4 fish in tank and not add any fish at all for 3 months? or do i remove the fish and wait 3 months and pray that the ich will be gone? i also have chaeto in sump do i remove that as well? im so confused with all the forums going on around everywhere... just need it i guess explained in simple terms any help would be greatly appericated and sorry for starting other thread on yet other ich problem.. also have 2 anomones and 3 cleaner shrimp and 1 fire shrimp thank you again in advanced