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Re: [APD] General Tank Update:
I don't hugely trust the test kit. But there seems to be limited
availability in the shops around here, perhaps I should look further afield.
The kit just says "ph indicator range 6.0 - 7.6" and the colour chart is in
jumps of .2,.3 or .4.
6.0 6.3 6.6 7.0 7.3 7.5 7.8
So to be .1 off... well I don't see it as very hard at all, and 20 sounds
like a decent CO2 level to me :-) Go figure. I'll shop around...
It's been suggested in another forum that with my Fe fertiliser, low
Nitrates, CO2 and 2watts/gal I may be being limited in my plant growth by
possibly phosphates or nitrates and there is a suggestion that I add
potassium nitrate to the tank..
Any other suggestions?
I expected to see some decent pearling with those specs but the pearling
(while being definitely there) is quite limited...
On 15/4/04 10:23 PM, "S. Hieber" <shieber at yahoo_com> wrote:
> Based solely on the ph and KH readings that you report, and
> assuming no other significant amounts of acids or
> alkalines, you CO2 is about 30-35 ppm. If the pH reading is
> off plus or minus 0.1, then the value could be about 20-50
> ppm. How confident are you in how you interpret the color
> If you believe the pH test kit reading, plus or minus 0.1
> units, I'd toss the CO2 test kit.
> You've got some flexibility here for adding carbonate
> buffer. Decide what range pH you want, add CO2 to get 15-20
> ppm, and manage the KH (adjust how much carbonate you add)
> soley to achieve your target pH range. It sounds like
> you'll be fine if the KH is around 4-5 degrees.
> If you are adding any traces with Fe, or adding Fe
> directly, don't worry about testing for Fe. The amount
> needed in most cases is less than the margin of error of
> most of the cheaper test kits around.
> good luck, good fun,
> Scott H.
> --- Tim Walker <twalker at swiftdsl_com.au> wrote:
>> Fish all seem to be okay. . .
>> Fish seem bright and happy. Betta recognises me, and
>> follows me around the
>> tank wherever I go, not afraid of anything that thing!.
>> SAE's having so far done a good job, I noticed some green
>> algae showing up
>> on some of the higher leaves, I'll see what happens....
>> My CO2 test kit showed 60ppm CO2 - I'm starting to doubt
>> it's accuracy...
>> Temp = 26
>> pH = 6.6
>> NH4 = 0
>> NO2 = slightly pink, but less than 1ppm.
>> NO3 was less than 5ppm
>> Fe = 0.5 (although I added a fert just after the test)
>> KH = 80ppm. = 4.46 deg dH
>> I have not yet done a water change. (4 weeks) According
>> to the pH/KH chart,
>> I should have about 30ppm CO2 at the moment, I kinda find
>> it hard to
>> believe???? Seeing as there is just a small stream of CO2
>> bubbles bubbling
>> through an airstone..
>> I'm still debating another 1/8 tsp of Sodium Bicarbonate
>> not sure, I'll test
>> in the morning and see if it's still 80...
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