Tropical Fish Keeping - Aquarium fish care and resources

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-   -   ph and KH question (http://www.tropicalfishkeeping.com/saltwater-fish-diseases/ph-kh-question-7172/)

Robnjo 07-27-2007 11:20 PM

ph and KH question
 
I got a bit of a Question that I don't understand with my tank at the moment but 1st my weekly water test from this morning.

Temp-26.8
SG-1.0225
ph-7.9
Amm-o
nitrite-0
nitrate10
calcium-440ppm
KH-196.9ppm
*last water change was 8days ago, of 50ltrs salt...I change 50ltrs every 2weeks.

how can my ph be down and my KH up?... doesn't carbonate hardness activator also push up ph or am I way off?
Rob.

St6_Devgru 08-03-2007 01:31 AM

maybe it needs more time

Robnjo 08-03-2007 09:58 PM

ok its a week latter and here is todays test but this time I did it @ 9:45am, not 8am. no water changes since the last test other then top-up.
Temp-26
SG-1.0225
ph-8.0
Amm-o
nitrite-0
nitrate10>20
calcium-400ppm
KH-196.9ppm
...so I'll put it down to "the time of day" and I'll do a test after lunch and thinking it will be about 8.2 or so.


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