My Ph Has Gone Up.

sylviepld

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Hello everyone. I have a 45 gallon planted tank with two HOB filters. After two years of having a pH around 7-7.2 my pH has recently gone up to 7.8. A few months ago I added some mopani wood but I thought that this could cause the pH to decrease not increase. I also have added several more live plants but apart from that nothing has changed. Any ideas why my pH has increased like this? How can I get it down and keep it down? TIA

Update:
I think that everyone is correct. I went online and did some research and the same thing has happened to other people who use the all purpose Flourish. I read in several places that it can raise your pH eg. 7.4 to 8.0. I don't think I really need the fertilizer so I'll stop using it and see what happens. I'll update later. Thanks for your input everyone.
 
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Rivermonster

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Tests can give different results over time. Add more wood if you want it to lower but your fish appear fine wouldnt bother trying to lower it
 

Rivermonster

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Not sure, if flourish increases kh (alkanlity) - prob does slighlty - then yes ph would increase. If plants have used less nutrients for some reason(less light?) then you may have more in your tank.
Are you adding flourish correctly - only pro rata to new water being added each time
 
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sylviepld

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Not sure, if flourish increases kh (alkanlity) - prob does slighlty - then yes ph would increase. If plants have used less nutrients for some reason(less light?) then you may have more in your tank.
Are you adding flourish correctly - only pro rata to new water being added each time
I've been adding a bit less than what the directions say and less often so I'm sure I'm not adding too much.
 

el337

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Might be pH, KH and GH changes from your tap but the value of your pH shouldn't matter.
 
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