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: ,