Are my clowns sick?

[eternitybc]

Hi all,

Just got my first two clownfish two days ago, they are tiny little guys about 1 inch long. I added them to my reef tank that's about 5 weeks old now. All the parameters look good. I noticed they both seem to have stringy poop and I'm wondering if I need to worry about it? They are both really active and seem to be eating. If it continues how long should I wait before I need to take action? There seems to be lots advise online about med dips and food and such but I want to make sure I'm not jumping the gun.