How do you increase PH..... - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 03-08-2006, 04:21 AM Thread Starter
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How do you increase PH.....

I have a Pressurized system. Airstone in Tank.....
Co2 injected with Lights on...

I am getting readings of 6.0-6.2 ( Real yellow on LaMotte Kit)...
KH is buffered to achieve 4 dkh.. = too high ....

The Airstone I have hardly on for starters..
PH out of the Tap ( 24 hrs later plus..) 7.5...................

I do have a couple of Petrified Wood Rocks in there hmmm.....
Tank is a little under a month old...
Substrate is Caribsea supernaturals..

Suggestions would really be appreciated!!!!
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post #2 of 7 (permalink) Old 03-08-2006, 04:41 AM
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Well, aged water with a 7.5 pH (assume 3.0 ppm CO2), says your KH should be 3-3.5. That seems like a reasonable match. Your CO2 injected pH is 6.0-6.2 which puts you in the 56.8-90 ppm of CO2. Sounds pretty ideal to me, so long as the KH doesn't drift downward.

Why do you want to increase the pH? Most plants/fishes shouldn't mind.
Brian.
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post #3 of 7 (permalink) Old 03-08-2006, 05:02 AM
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You can always put some crushed coral in the can to keep the KH replenished. Because I imagine you already know pushing in that much CO2 will deplete it and one should play it safe. If it gets near 3, I get nervous. KH of 4 is not really high, more like ideal IMO. I have 6.4 pH standing water out of a tap, and add 1.5 to 2 teaspoons of baking soda to 50G to bring the KH up to near 3. My CO2 brings the pH right back down to 6.7 pH, but the crushed coral keeps a moderate 4-5 KH for me. I have to add cal.chloride and mg as both my KH and GH are near zero out of my well water's tap.





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post #4 of 7 (permalink) Old 03-08-2006, 05:11 AM Thread Starter
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Well,
I have noticed ( I just got these guys the other day) my German
Blue Rams going up to the Surface for starters..
My Ottos look fine though.... They're not doing it..........

Plus, I thought that getting up in that high of range for CO2 is a bit much..
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post #5 of 7 (permalink) Old 03-08-2006, 12:46 PM
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Try cutting down on the CO2 rate. That will allow the pH to climb and reduce the amount of CO2 in the tank.
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post #6 of 7 (permalink) Old 03-08-2006, 02:00 PM
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Quote:
Originally Posted by markstr
I have noticed ( I just got these guys the other day) my German
Blue Rams going up to the Surface for starters..
I have seen that in my tanks also. I haven't gone to an overnight aeration approach yet, but I do have my vertical spray bar pointed slightly upward, and that seems to make things more pleasant for my fish. Actually, while playing with my driftwood recently, I lost the upward tilt to the spraybar. The next morning, I was seeing some stress. So, retilting the bar fixed up the problem within half an hour.

Or...you could just reduce your CO2 ,
Brian.
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post #7 of 7 (permalink) Old 03-08-2006, 03:08 PM Thread Starter
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I've got CO2 just "Barely" coming out already on the Stone...
I don't think I can reduce that anymore.. On the Output of the Eheim
(which is not a spraybar) just the reg. output nozzle, this is up Very Close
to the Surface which I would think, would reduce CO2 even more.....
Wonder if there is something in the Rocks ( Petrified wood) that effects PH?? Maybe I should a couple of the Rocks and submerge in a seperate bucket and check readings???
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