Clownfish Possible Internal Parasites? White stringy poop and inactive at bottom of tank

[nanoreefnewb]

Hello everyone,

I just added two clownfish about a week and a half ago to my 13.5g nano reef tank (after fishless cycling). Over the past few days I have noticed that my larger clownfish has been increasingly inactive. Yesterday I noticed a very thin white string about 1-2 cm long hanging from him. Nevertheless, he was still very active during feeding times. Today he has taken a large turn for the worse and is swimming near the bottom corner of the tank not moving around much at all. My other clownfish appears to be acting normally. Is it too late to save him or should I begin treatments? Any advice would be appreciated.

Pic of Fish (sorry for bad quality, he is at the back of the tank):

 

[Big G]

How's the fish's breathing rate? Fast, slow, labored?

 

[nanoreefnewb]

It seems pretty normal to me (or maybe a little bit fast) then again I dont have much experience so I dont really know what normal is.

 

[nanoreefnewb]

Ughh... I can't even get my hands on prazipro or other fish medication in Canada even if I wanted to since there is apparently regulations here.