Ph

[Roxxpac]

Dear reefers

Need help... Lately early in the morning my ph has been as low as 7.5 but around noon time it's already at 7.7-7.8... What's going on?
Thanks
Miguel

 

[Sterling_salt]

Very well could be because your lights can affect ph. I run the lights in my sump opposite the lights on my dt for this reason.

 

[Phranque]

Very good article on pH - also explains the daily swings with the light cycle:

http://reefkeeping.com/issues/2007-05/rhf/index.php