Weird skimmer question

[jeffrey750750]

My skim cup all day will be a 1/4" full for most of the day and when I go to bed. By the time I wake up the cup is full. Its weird cause its not gradually filling during like it does at night. Anyone else ever experience that?

 

[Silly clownfish]

No. that seems odd. Does it happen every day, or was this a one time occurrence?

do you have a doser or anything else on a timer?

 

[jeffrey750750]

No doser and for the past 7 days it has done that. Very strange

 

[Daddy-o]

3 of mine do that

 

[jeffrey750750]

I'm not complaining, I'm glad its working but my other doesn't do that

 

[Daddy-o]

Maybe something to do with lights off oxygen/carbon dioxide?