Need advice for treating my arowana - cloud eye and silme coat issue

[pURPLEcHILLIrED123]

Hello,

For that past 3-4 days, I noticed that my arowana has been laying on the bottom of my tank and has little air bubbles sticking on its slime coat. When the bubbles "unstick" and comes off, I also noticed some of the slime coat coming off also with the air bubbles. I woke up this morning and my arowana has cloud eye in both - right eye is not that affected, the left eye is about 50% affected. What type of treatment is needed to cure my fish? I am thinking about using melafix, the direction says dose everyday - does that mean dose the full treatment everyday? Arowana is about 18". Water changes every 3-4 days, about 35gallons each time. water conidtion is perfect. It seems like only the arowana is being affected. Thanks for any input in advice.

My tank is 168G with -

1 18" Arowana
7 dats 6-8"
1 9" sting ray
1 6" flag tail
1 3" shell FRT

 

[Deep Blue Sea]

get some pimafix, add some salt, raise the temp by about 2 degrees, and turn the lights off for most of the day if not all

 

[pURPLEcHILLIrED123]

the dosing say dose everyday... do I does the full amount per dose everyday or half?

 

[Deep Blue Sea]

full amount