New Reefer stupid question

So I took my girlfriends Fish Only salt tank of 7 years and upgraded.
Added a UV Steralizer, Skimmer, New light hood with T5-40's from
Marineland, changed the crushed coral to white Fiji sand, then added
75 lbs of live rock...let it settle for 2 weeks, then added about 8 or
9 different kinds of coral...awesome.

let it settle for 2-3 more weeks...bought a Blue "Dorry" fish...added
to the tank...which previously held like 3 fish...a Damsel and an
Orange Shoulder Tang, and 6 line wrasse...Bomb, Dorry has ick.

So I bough a cleaner wrasse...six line hated him, so I caught him, and
put him in a betta tank in my main tank for 2 days...let him out, and
he's exhibited no hostility toward the cleaner...he at one point was
catching the cleaner and dragging it across the tank to smash it into
the glass...bloody fins and all...relentless.

So I drop my salinity to 1.017, over 2 days, cause I don't want to
kill my coral, and a hospital tank won't hold all the fish coral etc.
Its been 1 week and half, and six line had ich for all of about 6 hrs,
no other fish has had ich, but Dorry...well she gets better then she
gets worse, and back and forth...I'm sick of this fish....short of
flushing is there anything else I should be doing?

I wash the walls down everyday with a fresh piece of filter media.
I've been doing small water changes.
I replaced my UV steralizer bulb.
I add slime coat stuff.

Please help...this topic is so varied in opinions...