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GH/KH and PH??

This is a discussion on GH/KH and PH?? within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> I do have small tanks,a 2.5,4 and 4.5 unfiltered,uncycled,so once a month a do 100%. Is that not right lol? I normally do 50% ...

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Old 07-06-2009, 09:24 AM   #11
 
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I do have small tanks,a 2.5,4 and 4.5 unfiltered,uncycled,so once a month a do 100%. Is that not right lol? I normally do 50% on them.

Yup my pandas are loving it apparently lol.

I tested my GH ( I know we said ignore it but i was curious) and now my tap is Very Soft. So something did change in our water supply.

As for the tanks,only thing I can think of is their airstone? Not sure what its made of. Other than that they have fake silk plants,decoration of some sort(plastic i think) and those vase type stones you find in the craft store.
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Old 07-06-2009, 12:05 PM   #12
 
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Quote:
Originally Posted by fishyinpa View Post
I do have small tanks,a 2.5,4 and 4.5 unfiltered,uncycled,so once a month a do 100%. Is that not right lol? I normally do 50% on them.

Yup my pandas are loving it apparently lol.

I tested my GH ( I know we said ignore it but i was curious) and now my tap is Very Soft. So something did change in our water supply.

As for the tanks,only thing I can think of is their airstone? Not sure what its made of. Other than that they have fake silk plants,decoration of some sort(plastic i think) and those vase type stones you find in the craft store.
All water changes are more effective at maintaining stable conditions in the tank when carried out more frequently with less water changed rather than less often with more water. If you could do 25% each week it would in my opinion make for a much more stable environment for the inhabitants. Very important.

An airstone wouldn't affect pH. What are those craft store stones? That doesn't sound too good; who know what may be leeching from them? I don't know what they are, but it seems likely they could be calcium-based so I would suggest removing them immediately and continuing with normal weekly pwc and monitor pH to see if it stabilizes. Even with a fluctuating tap water pH, if only 25% is changed and the tank itself is stable, there should be no problem. I do 40-50% of my 70g and 90g every week, the tap water is 6.8 or 7.0, the tank is 6.2 immediately before the pwc, and an hour after the pwc the tank is 6.4-6.5 which is fine. I believe the stability of the tank biological system is the key. And of course not adding water that varies too much.
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Old 07-06-2009, 05:34 PM   #13
 
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Hmm...my tap has changed again!!

Yesterday-
GH 4.48 (very soft)
KH 1.68 (very low)

Today-
GH 7.8 (soft)
KH 3.36 (still kinda low,but not as bad as yesterday)

The pH has remained the same. So in short,I think I am gonna forget all about GH and KH LOL.
Just test for pH. This was way too much work for my lil brain. I am done thinking about it.

Thanks for reading and putting up with me haha.


Thanks for everything Byron and Aunt Kymmie.
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Old 07-06-2009, 10:08 PM   #14
 
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Just a thought.... when you test pH of the tap, you need to allow for excess CO2 to dissolve from the sample prior to testing, otherwise you will get a false low pH reading. For best results, you should allow overnight for this to occur, preferably with the help of an air stone.

On the subject of harness, I agree that you do not necessarily want to adjust hardness. However, with a daily hardness testing you can get an idea of long it takes for the carbonates and other buffering ions in your water to be depleted, at which point the pH will begin to swing. In a freshwater aquarium, testing hardness can be an excellent indicator of when it is time to do the appropriate water change.

For the original question, you stated that your GH is ok, but your KH is extremely low. All this means is that you lack carbonate buffering ions. General hardness is a measure of all the buffering ions, including bicarbonates, borate, and phosphorus. Having a low KH is not necessarily a bad thing, provided your GH is sufficient to prevent pH swings. I would personally add a buffer, such as Proper pH 6.5, to replenish some carbonate ions.
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Old 07-07-2009, 09:41 AM   #15
 
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Thanks Pasfur! I was wondering what I could do about the low KH without messing up the pH too much. I will have to look at my lfs.
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