How long can water sit in a reactor?

[TWYOUNG]

I'm going to run my GFO reactor, (also carbon since it's a dual reactor), intermittently to regulate phosphate levels. How long would it take before I have issues with anoxia? I'm talking hours not days.

 

[ryanjohn1]

It should be fine

 

[Randy Holmes-Farley Verified Community Expert]

You can check the smell when it first starts up to see if it have produced any hydrogen sulfide.

 

[TWYOUNG]

You can check the smell when it first starts up to see if it have produced any hydrogen sulfide.

Do you suspect that could happen in a matter of hours, or would it likely take days? I once accidentally left a canister filter off for a month between cleanings. Fortunately I discovered my mistake and cleaned it out before it was restarted but I definitely know the smell!

 

[Randy Holmes-Farley Verified Community Expert]

How fast depends on how much and what type of organics are present. Hours may be ok.