Found a Surprise in My Mixing Station

[chunkysoup56]

Recently mixed my second batch of SW in my new mixing station. Woke up
This morning to check the salinity and found this?!????

Any thoughts on what this could be? My first guess is maybe something hitchhiked in on my testing supplies.....? Refractometer Pipette, etc.

The whole system was sanitized prior to use and kept closed in between uses with lids on

 

[MrsBugmaster]

No idea what it is, but it looks pretty weird.

 

[SaleenCB]

That's really odd; no idea. Looks like spider webbing consistency....at least from the pic

 

[sawdonkey]

Reef Crystals? It often creates a snot.

 

[Katrina71]

Looks like a type of mold to me.

 

[vetteguy53081]

Its a biofilm from slime and bacteria which will occur when the unit is unfiltered.
I believe if you add about 2-3 ounces of Hydrogen peroxide which is tank safe to container, you will see it diminish.