the PH is getting me crazy.... Help.... - The Planted Tank Forum
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post #1 of 2 (permalink) Old 02-11-2004, 02:28 AM Thread Starter
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Hey guys I need your help...

I used to have a 75 gal aquarium planted tank with discus on it working fine . After I moved to my new house my tank only has substrate and discus; cero plants, cero C02, cero fertilizer, just water, Fluorite and fish.

My new tap water is PH=6.5, KH<1, GH=3 and nitrates=0. After aging the water 1 day the PH is the only change, 6.4. I filled the tank 4 days ago with this water and added 3 tspns of baking soda, so water was PH=7.0, KH=3, GH=3 and nitrates=0.

This are the results I have so far :

02/08/04 KH=3 GH=3 PH=6.9 07:00 pm
02/09/04 KH=3 GH=2 PH=6.8 07:00 pm
02/10/04 KH=3 GH=2 PH=6.7 07:00 pm

:?: Would you guys explain me why the PH is going down ???? Also, I have a homemade digital PH meter (and It's working fine, I checked with 4.0, 7.0 and 10.0 PH solutions) and at nights the PH is instable, goes up and down from 6.6 to 6.9, what is going on ???? :?:

Thanks in advice :idea: ,

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post #2 of 2 (permalink) Old 02-11-2004, 05:31 PM
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Driftwood, peat, ecocomplete? My point is something other than carbonate is affecting the PH, the usual culprits above.


75 gal heavily planted,50/50 Black beauty,Eco-complete substrate, Pressurised CO2 with solenoid, ph controller, AB Reactor 1000, 330 watts 9325K GE PC lighting,Ehiem Liquidoser, 2-Filstar xp3 canisters.
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