Debris in water??

[saltnewbie101]

Never seen this before and I've had saltwater tanks for some time.

There is random debris in the water, it's very light almost like it's part of the water. I turned the filter off to feed the corals qnd I noticed that the debris is stagnet.

200G cube, FX4 and FX6 canister filters with a uv light.

Any thoughts?

 

[saltnewbie101]

Any ideas?

 

[VintageReefer]

What is your alk, calcium, and ph