03-07-2013, 05:09 PM
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Originally Posted by smit3183
Plants raise ph? Never heard of that before
actually there is an interaction bewteen co2, carbonate (as in carbonate hardness), and pH.
As JDM reported with lights on pH rises and with lights of it drops down.
In my experience with sufficient plants what happens is that the tank can become a net sink of co2 and source of o2 each 24 hour period.
I have had tanks both fw and marine that had low pH untill I added plants. After adding the plants (marine macro algaes) the lowest pH (at night) was still much higher then the highest pH before adding plants. One marine tank went from a ph of 7.5 (high rang test kit) to over 8.4 in just a few days after adding macro algaes.
But that's just my .02