Adjusting Ph

[Koresample]

I have a light on my fuge that is on during the day (12 hrs on/12 hrs off). Are you saying that this should be reversed and have it on at night and off during the day?
I have kept a log book since starting the tank, and my Ph has been 7.8 now for over 2 months. Actually, since switching to DD salt as opposed to Instant Ocean, most of my parameters have been pretty stable with my Mg and Ca only fluctuating slightly (i do have a light load of Corals and inverts though).

[wickedfrags]

You bet - the light on the fuge should be on when the lights on the main tank are off to help stabilize pH, known as reverse-daylight lighting (to promote photosynthesis when the main lights are off).

Originally Posted by Koresample

I have a light on my fuge that is on during the day (12 hrs on/12 hrs off). Are you saying that this should be reversed and have it on at night and off during the day?
I have kept a log book since starting the tank, and my Ph has been 7.8 now for over 2 months. Actually, since switching to DD salt as opposed to Instant Ocean, most of my parameters have been pretty stable with my Mg and Ca only fluctuating slightly (i do have a light load of Corals and inverts though).

[Myka]

I agree with Wicked Frags, don't try to adjust it directly by altering alkalinity or using pH buffers. Another thing to consider is that having CO2 in the house will lower the pH of the tank. Same with not having a protein skimmer. Excess nutrients will also cause the pH to drop. Something as simple as adding an air pump in the sump will often do the trick if you don't have a skimmer. Your SeaClone is probably doing the trick by adding bubbles, although I question how effective it is at removing nutrients.

You can also take a peek for some more info on pH in the article I wrote (link in sig).