When is the best time to test ph.

[REEFKEEPER10]

I keep getting a low reading of 8.0 and it is making me crazy.

 

[Aquaph8]

Its naturally gonna be lower when your lights are off. I like to have a meter with probe so I get readings all the time.

 

[REEFKEEPER10]

I have a Profilux 3 controller but the probe is reading wrong. I have got to get a new one or it might need cleaned but I don't know how to do that.

 

[Mike&Terry]

You can use a soft toothbrush to clean the probe.

 

[Aquaph8]

You can use a soft toothbrush to clean the probe.

+1, I think your suposed to replace them once a year also.

 

[reelsilly]

I check mine right before the lights go out and soon there after as well. I like to see how much it swings. I also use a bright refugium light to help the PH stay a bit higher when the main lights go out.

 

[REEFKEEPER10]

i have a 100 Watt 6500k compact florescent over my refugium. do i need to soak it in vinger or something