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Re: comments on water analysis (and pH question)
- To: Aquatic Plants Digest <Aquatic-Plants at actwin_com>
- Subject: Re: comments on water analysis (and pH question)
- From: "H. Hoekstra" <hugo at greed_nl>
- Date: Sun, 06 Jun 1999 01:19:03 +0100
- In-Reply-To: <199906050748.DAA03091 at acme_actwin.com>
>Date: Fri, 4 Jun 1999 19:46:32 -0600 (MDT)
>From: "Roger S. Miller" <rgrmill at rt66_com>
>Subject: Re: Comments on water analysis
Hello Roger, thanks for your comments.
>Gee. I wrote a response to this that should have shown up in APD V3 #1071
>but it didn't show up. I'll try again.
I also had that problem this week. Did you send the message under another
alias than the one to which your digest is mailed?
>Actually, with regular water changes your 0.02 mg/l of iron might be
>sufficient. Most things seem fairly well balanced, but if your plants
I'm very happy with that, I'll add no more fertilizer just change 25% of
the water every week or more frequent.
>tend to drop old leaves before they should and especially if they have
>small holes and dead spots in the middle of the leaves then you might add
>a little potassium. Magnesium is probably fine at 3.6 but if the plants'
>color seems too light green then you might try adding a little magnesium.
>Unfortunately the light green color isn't diagnostic and could be caused
>by several things.
>In looking at a water analysis like this, always remember that maintaining
>fish in the aquarium always adds substantial amounts of nutrients to the
>tank. The nutrients in the analysis aren't all the nutrients that you're
>supplying to the tank.
I know but when the necessary trace elements aren't being added through
water changes or fertilizer plants will show defficiencies or not? I mean
are fish providing any other nutrients for plants than ammonia, nitrate and
>> Physical-chemical parameters
>> average temperature ░Celcius 11,5
>> dissolved oxygen mg/l O2 10,0
>> turbidity factor FTE 0,13
>> pH 7,25
>> satiation index Sl 0,06
>> rest ▀ activity Bq/l <1
>> conductivity by 20░ Celcius mS/m 36
>> oxidizability with KMnO4 mg/l O2 0,6
>> UV-extinction 254 nm m-1 2,6
>> Anorganic parameters
>> hydrogencarbonate mg/l HCO3 116
>> CO2 mg/l CO2 2,4
>> aggressive carbonic acid mg/l CO2 <0,5
>> Chloride mg/l Cl 46
>> Sulphate mg/l SO4 37
>> Sodium mg/l Na 22
>> Potassium mg/l K 1,2
>> Calcium mg/l Ca 50
>> Magnesium mg/l Mg 3,6
>> Total hardness mmol/l 1,4
>> ░DH 7,8
>> Ammonium mg/l NH4 <0,01
>> Nitrogen mg/l NO2 <0,02
>> Nitrate mg/l NO3 0,2
>> Orthophosphate mg/l PO4 0,03
>> Silicic acid mg/l Si 6,5
>> Iron mg/l Fe 0,02
>> Manganese mg/l Mn <0,01
>> Am I right in the assumption that the KH is 1?
>I calculated 5.3 degrees KH. My Tetra test kit would read 6 degrees.
That's good. My test kit (color strip test) had a vague green color meaning
2 or less. The petshop tested between 4-5 but there is a lot of contamination
in their tests. Tested with both several times but didn't know until now
which was the most reliable.
And I do have a new question, are there any factors which can *raise* the pH
in a tank besides certain rocks?