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Re: [APD] General Tank Update:

Add KNO3 to get nitrates around 10 ppm. This page will help you figure out how much to add:

http://www.csd.net/~cgadd/aqua/art_plant_dosage_calc.htm<http://www.csd.net/~cgadd/aqua/art_plant_dosage_calc.htm>

----- Original Message ----- 
  From: Tim Walker<mailto:twalker at swiftdsl_com.au> 
  To: aquatic-plants at actwin_com<mailto:aquatic-plants at actwin_com> 
  Sent: Thursday, April 15, 2004 5:32 AM
  Subject: 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.

  e.g. 

  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...

  Thanks people,
  Tim


  On 15/4/04 10:23 PM, "S. Hieber" <shieber at yahoo_com<mailto: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
  > reding?
  > 
  > 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<mailto: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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