Got an interesting for you.

[bones6966]

Sooo I found these in my makeshift rector. (small hang on back filter filled with media.) 

I'm not sure if they are *large* copepods or something or some other hitchhiker that managed its way into my tank. 

 

Some weird sort of crustacean thing. looks like a mini shrimp and swims like one. 

I did dose copepods at some point a long time ago but the fish ate them up fast and I have seen anything in the tank. 

 

They mesure about 2mm or 1/8" ish. 

[WV Reefer]

6 minutes ago, bones6966 said:

Sooo I found these in my makeshift rector. (small hang on back filter filled with media.) 

I'm not sure if they are *large* copepods or something or some other hitchhiker that managed its way into my tank. 

 

Some weird sort of crustacean thing. looks like a mini shrimp and swims like one. 

I did dose copepods at some point a long time ago but the fish ate them up fast and I have seen anything in the tank. 

 

They mesure about 2mm or 1/8" ish. 

Amphipod 😊

[DaJMasta]

Yep, amphipod.  They are basically large copepods, and they hitchhike and multiply similarly and live off the detritus in the tank.