[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [APD] CO2 problems (??)



By the way, correct me if I am wrong but KH 9 and pH 7.0 yields about 27 
ppm of CO2.  Not 170.

I use the formula: 3*KH*(10^7-pH)

That means 3*9*(10^0) = 3*9*1 = 27 ppm.

Or am I missing something?

Vaughn Hopkins wrote:
> CO2!!  My 29 gallon tank last tested at 170 ppm CO2 (KH - 9 and PH - 
> 7.0), with no distress to the fish.  So, I did the overnight test:  
> take a small cup of water from the aquarium and let it sit over night.  
> Then test both it and the aquarium water.  The CO2 in the overnight 
> water should show about 3 ppm, reflecting the atmospheric CO2.  The 
> difference between the two should be about 30 ppm CO2.  That will give 
> you a more accurate CO2 reading, but if the fish don't object yet, just 
> increase the bubble rate no matter what the test shows.  Do that early 
> in the day and watch for fish distress.  Keep jacking it up a little 
> each day until the fish say "uncle!" then drop it down a notch.  That 
> should be the right amount of CO2 for your tank.  I finally did that 
> and my algae problems dropped off considerably.
>
> Vaughn H.
>
> On Wednesday, March 1, 2006, at 03:29 PM, Barry Anderberg wrote:
>
>   
>> It is.
>>
>> Vaughn Hopkins wrote:
>>     
>>> Is this a 29 gallon aquarium?  You seem to have omitted that piece of
>>> data.
>>> Vaughn H.
>>>
>>> On Tuesday, February 28, 2006, at 05:20 PM, Barry Anderberg wrote:
>>>
>>>
>>>       
>>>> My city water report says my water's alkalinity, due entirely to
>>>> bicarbonate and nothing else, is 17.5 dKH.
>>>>
>>>> My Aquarium Pharmaceuticals test kit confirms this number.
>>>>
>>>> Both Red Sea pH test and Aquarium Pharmaceuticals pH test agree that 
>>>> my
>>>> pH is currently at or around 6.8.
>>>>
>>>> That gives me a whopping 85 ppm of CO2 in the water.  This stands to
>>>> reason as I am bubbling about 3 bubbles per second into an external 
>>>> DIY
>>>> reactor.
>>>>
>>>> The problem?  None of my fish are showing any stress at all, which
>>>> makes
>>>> me wonder if I am missing something and that my CO2 really isn't that
>>>> high.
>>>>
>>>> As a newbie to planted tanks I'm also obsessed with getting my plants
>>>> to
>>>> pearl, and they do, every day almost all day long, but it isn't very
>>>> heavy pearling like I have seen in some photos.
>>>>
>>>> Maybe I should try some riccia.
>>>>
>>>> Also I am starting to see some hair algae on the older growth leaves,
>>>> especially on my ludwigia.  I thought if I kept the CO2 high and made
>>>> sure my plants had all the nutrients they needed I would be able to
>>>> avoid this kind of thing.
>>>>
>>>> my tank is as follows:
>>>>
>>>> 100% eco-complete
>>>> 10 total hours of lighting, 65W CF lighting with a 3 hour, 2x65W
>>>> "mid-day"
>>>> Water: 22 dGH, 18 dKH, 6.8 pH
>>>>
>>>> Aquarium Pharm. Test Kit Results (for whatever they are worth)
>>>>
>>>> NO3: 20 to 30 ppm
>>>> PO4: 5 ppm
>>>>
>>>> I dose using the Estimative Index as follows:
>>>>
>>>> Sunday: 50% water change, followed by dose of 1/4 tsp KNO3, 1/16 tsp
>>>> K2SO4, 1/16 tsp KH2PO4
>>>> Monday: 15 mL Plantex CSM+B mixed at 1 tbsp. per 250 mL water
>>>> Tuesday: Same dosing as Sunday
>>>> Wednesday: Same as Monday
>>>> Thursday: Same dosing as Sunday
>>>> Friday: Same as Monday
>>>> Saturday: Nothing
>>>>
>>>> How can I improve my tank and get better, faster growing, healthier
>>>> plants and stop that annoying hair algae that is starting to form?
>>>>
>>>> _______________________________________________
>>>> Aquatic-Plants mailing list
>>>> Aquatic-Plants at actwin_com
>>>> http://www.actwin.com/mailman/listinfo/aquatic-plants
>>>>
>>>>
>>>>         
>>> _______________________________________________
>>> Aquatic-Plants mailing list
>>> Aquatic-Plants at actwin_com
>>> http://www.actwin.com/mailman/listinfo/aquatic-plants
>>>
>>>
>>>
>>>       
>> _______________________________________________
>> Aquatic-Plants mailing list
>> Aquatic-Plants at actwin_com
>> http://www.actwin.com/mailman/listinfo/aquatic-plants
>>
>>     
>
> _______________________________________________
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
> http://www.actwin.com/mailman/listinfo/aquatic-plants
>
>
>   

_______________________________________________
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com
http://www.actwin.com/mailman/listinfo/aquatic-plants