Hardness/PH

Ever wondered how it works? Well, here is the place to post your questions!

Postby Dookie » 2006-05-27 17:59

My tapwater is medium hardness and ph 7.0
Today I tried boiling up a big pan of water and kept it at the boil for 2 mins, I had read that some of the hardness could be removed by boiling. It was being prepared for my cardinal and danio tank. When the water had cooled I tested the PH, this is what I really don't understand. The ph had risen to 7.6 (possibly higher If I had tried testing it on the high range ph test kit.)

Does anybody understand why this happens? I don't want to use it in the aquarium now as I don't want to raise the PH.
User avatar
Dookie
Addicted member
 
Posts: 663
Joined: 2006-04-23 19:08
Location: North Tyneside

Postby Indigo Blue Fish » 2006-05-27 19:30

Ok - has your kettle got limescale in?
And two - did you let it cool in the kettle?

The lime can dissolve back into the water from the sides, and when cooled will settle to a state which can cause the pH to rise.
Strip the lime out, boil again and cool in a different, clean container.
You should find the pH stays lower then.
User avatar
Indigo Blue Fish
Addicted member
 
Posts: 5132
Joined: 2005-10-18 19:42
Location: England

Postby Dookie » 2006-05-28 07:22

IBF
I didn't use the kettle for the reasons you've just given. I used a stainless steel pan, and cooled it in my aquarium use bucket. :vic:
User avatar
Dookie
Addicted member
 
Posts: 663
Joined: 2006-04-23 19:08
Location: North Tyneside

Postby KittyKat » 2006-05-28 15:13

if you tested the pH right when the water came out of the tap, your reading would have included disolved CO<sub>2</sub> which lowers the pH. by boiling, the CO<sub>2</sub> would have bubbled out of the water, so as a result the pH would have risen. let tap water stand for 24h before testing it to get a more accurate reading :tup:
Kat
stock list | main display tank | 60 litre cycle log (aka, guide for beginners) | Flickr
User avatar
KittyKat
Site admin
 
Posts: 6873
Joined: 2005-09-04 14:50
Location: Norwich, UK

Postby Dookie » 2006-05-30 17:53

Kat.
Tried your suggestion thismorning. After 24 hours it had gone fomr 7.0 -7.2

Something else that is strange is that my 2 tanks, one is set up with bogwood and loads of live plants, the other a limebased rocky set up for the malawis. Both now have the same PH reading of 7.2 (malawi tank used to be 7.4 untill I took out the coral sand and it dropped without any WC overnight.)

I can't seem to get away from the 7.2 no matter what I do!

I'm bamboozled.


Are thoes chemical PH adjusters really so bad???
User avatar
Dookie
Addicted member
 
Posts: 663
Joined: 2006-04-23 19:08
Location: North Tyneside

Postby KittyKat » 2006-05-30 18:53

see my other post for the answer to that :) thank goodness i study chem!

ask your water company to send you a detailed analysis of your tap water... might be something there...
Kat
stock list | main display tank | 60 litre cycle log (aka, guide for beginners) | Flickr
User avatar
KittyKat
Site admin
 
Posts: 6873
Joined: 2005-09-04 14:50
Location: Norwich, UK

Postby Dookie » 2006-05-31 12:49

Kat. I asked for the water report last week and it arrived thismorning. There are so many things on it, like over 3 pages of test results. Any imparticular I should be looking out for?
User avatar
Dookie
Addicted member
 
Posts: 663
Joined: 2006-04-23 19:08
Location: North Tyneside

Postby KittyKat » 2006-05-31 13:12

just post them on here :tup: mine was three pages last time i asked for one

basically any abnormalities, anything that will acidify the water...
Kat
stock list | main display tank | 60 litre cycle log (aka, guide for beginners) | Flickr
User avatar
KittyKat
Site admin
 
Posts: 6873
Joined: 2005-09-04 14:50
Location: Norwich, UK

Postby Mick e. t. » 2006-05-31 14:37

Dookie re your water board report, I scanned mine coz typing that lot out in the BB code format was/is a nightmare. What your looking for are the GH and KH readings plus nitrate, nitrite, phoshate, magneseium, pH and anything that stands out as in an exceptionaly high reading.
BTW My tap water...GH 18...KH 9. The nitrate varies between 20 ppm to 40 ppm and although I am always trying to keep it below 20 I have found over the years that it has not affected or inhibbited my Malawis in anyway.
(even when it's off the scale)
Mick e. t.

Life aint black and white, it's full of colour
Image
User avatar
Mick e. t.
Addicted member
 
Posts: 1927
Joined: 2005-11-03 17:31
Location: Lincoln U.K.

Re: Hardness/PH

Postby valemont » 2018-05-21 19:59

iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562iy12562
iy12562iy12562
valemont
Addicted member
 
Posts: 16298
Joined: 2018-05-07 04:38


Return to Water chemistry

Who is online

Users browsing this forum: No registered users and 1 guest

cron