What time to test water

[ztigris]

I was thinking about when it's best to test the water in a planted tank. At the beginning of the photo period? Middle? Or end of the photo period?
I usually test in the middle during the week and right before on the weekend. I was thinking yesterday that the levels may change from beginning to end of the photo period.

 

[sudz]

All that would change any large amount would be PH, because of CO2 levels.

I test mine before my water changes, and then one day after. usually ends up being around 10:00PM.

 

[ztigris]

My thought process was, since the plants are utilizing nitrates, etc. That may cause it to test higher or lower depending on the time you chose to test.

 

[Donkey Gun]

It's an interesting thought. At first I wouldn't think it would change too much, but it may be worth keeping a log and testing the different time periods for the month. Then you can look back and see if there is a steady change throughout the day.

you made my brain hurt..

 

[Donkey Gun]

It's an interesting thought. At first I wouldn't think it would change too much, but it may be worth keeping a log and testing the different time periods for the month. Then you can look back and see if there is a steady change throughout the day.

you made my brain hurt..

Edit: Consistent change not steady.

 

[ztigris]

you made my brain hurt..

It's a gift I have. I overthink things.