Slimy cobwebs

[chubbyhubby]

Tank been running for 3 years . Been working away for 3 days come home tonight to find my sump full of slimy cobwebs.
Done test results being
Kh 8.3
Cal 440
Mag 1360
Phos 0.03
Nitrate 0.25

Added a pic of skimmer as working fine.
Display tank is looking 100% perfect no issues with it at all. And I also don't run any light in my sump only for maintenance. Does anyone have any idear what it is .
Tia dean

 

[James M]

Bacteria bloom

 

[chubbyhubby]

Bacteria bloom

How comes it is only in the sump

 

[derek.gray.988]

Do you dose vodka, vinegar, or NOPOX? I've noticed these bacterial colonies when using these.

 

[chubbyhubby]

Yes I dose vodka

 

[DSC reef]

Typically your bacterial mulm will collect in the sump due to the lower flow compared to the DT.

 

[chubbyhubby]

Typically your bacterial mulm will collect in the sump due to the lower flow compared to the DT.

How's best to stop it

 

[Turbonut]

How's best to stop it

Cut back on your dosing, ur dosing to much

 

[DSC reef]

How's best to stop it

Slow down on dosing but do it slowly while testing frequently. It should slowly clear up. When running biopellets this would happen when adding more to the reactor. Since your liquid dosing it's much easier to control.

 

[chubbyhubby]

I'm dosing 7ml of vodka a day iv dropped it to 6.5ml yesterday