Brown Film in water

[Reno Nole]

New to hobby have a Nano tank with success and moved to a 75 gallon. New RODI system from BRS. First time making my own saltwater. Mixed 55 gallons of Instant ocean reef crystals with wave maker for 48 hours. The unit and cord has a brownish film on it. Any ideas what it is and is it safe. Thanks for any reply!

 

[s1oliver]

I haven't personally used reef crystals but have heard that brand has a residue associated with it so I stayed away from it. I use the regular Red Sea in the blue bucket and never had any residue left behind in the mixing bucket or show up in my tank.

 

[Reno Nole]

I haven't personally used reef crystals but have heard that brand has a residue associated with it so I stayed away from it. I use the regular Red Sea in the blue bucket and never had any residue left behind in the mixing bucket or show up in my tank.

Thanks!

 

[glb]

The residue is normal for instant ocean salt and I’ve never had a problem in my tank as a result.