Pale lesion on clown fish?? Brook?

[kikimango209]

Hi I am fairly new to marine tank as I only have kept freshwaters.
I have one small orange clownfish and this fish developed white~opaque lesion on R) side of its body.
I wasn't sure if it's just body colour change or some kind of infection?
I kept this fish about ~1.5month. Noticed this lesion a few weeks ago. (cannot remember how many weeks).
Does not appear skin peeling, looks more of discolouration.

I did not QT this fish as I didn't have a spare filter for QT tank.
Its tank mates are two hermit crabs, one cleaner shrimp and a threespot blenny.
Should I move it QT tank? Does it look infection or just body color change..? I have a 10G empty tank I can possibly use as a QT (need to buy a filter tho).
So far, it eats well and swims well.

Please give me advice experienced refee-rs!
I lost two clownfish already (no I didn't keep 3 in one tank) and I don't want to lose this one (one jumped out, the other one was bullied to death by this naughty one)

 

[Mastiffsrule]

Hi,

Saw you were helped in the other thread so just wanted to say #WelcometoR2R here. If you have more issues with the clown keep us updated in your other thread.