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Author Topic: UH OH! Ph spike overnight!  (Read 967 times)
wiki
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UH OH! Ph spike overnight!
« on: June 20, 2011, 05:05:58 PM »

Ok... so yesterday the PH was 7.4 (and has been 7.4 constantly since i startred the tank) ... overnight it has gone up to 8.8!!!

Tank is still cycling... Am about to do a water change for the Ammonia... I believe the high Ph makes the ammonia more toxic... Tank has been set up about a month...

65gal tank with 3 smallish comets in it.

Ammonia 0.5
Nitrite 0.25
Nitrate 0
18 degrees Celcius

Ok... so what ould cause the Ph to go so high so suddenly? how can I fix it??
The fish seem very happy at the moment but this will not be good for them in the end I am assuming...

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wiki
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Re: UH OH! Ph spike overnight!
« Reply #1 on: June 21, 2011, 04:23:54 AM »

Update... did a 40% water change which lowered the ph to 7.8 (ok... right???) and of course it lowered the ammonia too ... I still dont know what caused this spike or how to stop it happening... They have sooooooo much water between them... I don't get it...
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Nossie
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Re: UH OH! Ph spike overnight!
« Reply #2 on: June 21, 2011, 04:33:30 AM »

It's fine, just keep up the water changes and it should go back to normal. If you wish, you could try and mix some pH lowering agents into the fresh water before pouring it in the tank, but I do suggest not tampering with the pH too much. Goldfish are fine with it either way as long as it won't change very often, which it would, if you'd start mixing pH-lowering chemicals in there on a more regular basis.

Everything's a bit unstable in the tank while it cycles, so be prepared Smiley
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scrivens345
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Re: UH OH! Ph spike overnight!
« Reply #3 on: July 20, 2011, 12:13:59 PM »

Be aware that tap water/distilled water is about pH5.5 to pH6 owing to dissolved carbon dioxide, so as long as you keep up the water changes your tank should be fine Cool

you should also be aware that the pH scale is logarithmic, ergo an increase of pH by 1 halves the concentration of free oxonium ions (H3O+) 
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scrivens345
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Re: UH OH! Ph spike overnight!
« Reply #4 on: July 20, 2011, 12:41:47 PM »

oops! my bad it's log base ten so the concentration drops to a tenth of the previous level Undecided
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