Old Rotifers and reef food

[DharkaronReef]

Hello,

I have 2 bags of old Rotifers and active sphere reef food without an expiration date. It is similar to phytoplanktons. I believe they are from 2011. Is it safe to feed my corals and fish with this? Or will my phosphates spike up?

 

[KrisReef]

Zooplankton. Has it been in the freezer? If not, I would expect it to degrade over time and like a long misplaced McDonalds hamburger it looks ok after years in storage but I suspect it might taste funny at best. I would not expect it to spike your phosphates unless you over feed with it, but there will be some phosphate in the plankton.

 

[DharkaronReef]

Thanks for the replay Kris. It's not the frozen one. It's dry, powdery reef food. It's been kept in a storage container for 5+ years.