Re: [APD] My tank water doesn't match the tap water

[Vaughn Hopkins <hoppycalif at yahoo_com>]

It isn't possible to heat the sand above 220 F or so while it is in 
water, and silica forms take something like 4000 F to melt.  So, 
whatever you are seeing being melted, it isn't the sand itself.  Maybe 
there is a wax coating on the sand?

My KH out of my tap is low - about 2 degrees as I recall, so I add 
baking soda to raise it.  Your hardness is a whole different thing 
beyond my experience.  And, I don't remember reading anything about 
just how much CO2 can be in tap water, just that it isn't a trivial 
amount.

Vaughn H.
On Tuesday, January 31, 2006, at 03:29 PM, Barry Anderberg wrote:

> Anyone?
>
> Barry Anderberg wrote:
>> I noticed that my tank water's KH is 24 dH and my tap water is 20 dH.
>>
>> Another thing I found was that my tap's pH is about 7.5 meaning I have
>> about 19 ppm of CO2 right out of the tap.
>>
>> Putting the water in a bucket with an airstone for a few hours 
>> confirmed
>> this as the pH of that water went up to near 8.0.
>>
>> I have nothing in my tank that would contribute to carbonate hardness.
>> At present it contains silica sand, three pieces of driftwood, four 
>> fake
>> plants, and a crappy "Whisper" brand heater which seems to have melted
>> some of the silica sand when it was closer to the bottom of the tank.
>> How that's possible at 80F is anyone's guess..
>>
>>  I guess I would like to know if others routinely experience a change 
>> in
>> KH from tap to tank, what could be causing it, and also if it is
>> possible and/or common to see 19 ppm of CO2 in tap water.
>>
>> Thanks.
>>
>>
>> Barry Anderberg wrote:
>>
>>> I am amazed at the fact that we are able to send human beings into 
>>> outer
>>> space, split the atom, and uncover the secret laws of the universe, 
>>> and
>>> yet we cannot figure out why algae grows or doesn't grow in a planted
>>> aquarium.
>>>
>>> I find that a little hard to swallow, especially given all the 
>>> people in
>>> the world with degrees in botany and plant biology, etc., etc.  
>>> People
>>> in the planted tank community may not have unraveled the mysteries of
>>> algae but I'm pretty sure someone somewhere knows exactly what makes
>>> algae grow, or not.  I think.
>>>
>>> -Barry
>>>
>>> Liz Wilhite wrote:
>>>
>>>
>>>> On 1/29/06, Jerry Baker <jerry at bakerweb_biz> wrote:
>>>>
>>>>
>>>>
>>>>> S. Hieber wrote:
>>>>>
>>>>> Agreed. The fact that there are so many ways to successfully grow 
>>>>> plants
>>>>> says to me that there is a lot we don't know. There is an objective
>>>>> truth out there -- a recipe guaranteed to grow plants well and 
>>>>> algae not
>>>>> so well. The problem is we don't yet know enough to say exactly 
>>>>> what
>>>>> that recipe is.
>>>>>
>>>>>
>>>>>
>>>> I disagree.  I think there are many recipes out there for what 
>>>> works.  There
>>>> are many balance points.
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>>>>
>>>>
>>>>
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>>
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>
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