pH Question

spud71

New member
What makes pH go high in a tank? My 50 gal (+10sump) ranges from 8.33 at night to a round 8.58 during the day.

Is this too high? I am concerned that it is I have seen it peak at 8.61

My dkH is at 10.9 and my calcium level is 480, measured this morning (salifert kits) with a pH of 8.33 and temp of 77.5 (tank is maintained with a Neptune Jr controller at 78 +- .5 )

I have two 175w Mh and two 96W PCs. The PCs are on for 12 hours and the MH for 8 of those 12.

The tank is very lightly stocked right now having just cycled; 2 false percula, 1 royal gramma, 1 squamosa, 2 mushroom polyps and a reef cleaning crew of snails and hermits. All save the added cleaning crew were moved recently from a smaller tank.

Can anyone tell me what steps I can take if this pH is too high? I doubt I will be able to get a CO2 injection system though which is the only solution I have seen so far.
 
In response above I have both two part ESV B-Ionic and Powdered Calcium, Buffer.

As the tank has just cycled and everything seems so high, I have not used it yet
 
It's strange that the alk would stay so high without any supplements through the cycle.
I'm quessing you started with Instant Ocean?

SteveU
 
Newly mixed IO salt has only 360ppm of calcium (instead of 480ppm), I think some additives must have been added to the water.
 
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