Also I forgot to mention. You are using Nutrafin Diffuser and you can
adjust the tube to higher position to reduce CO2




"-=Almazick=-" wrote in message
news:lcuBa.768821$OV.704706@rwcrnsc54...
Reduce CO2 immediately but don't stop because it'll change PH very fast
and
your fish might die. Keep your Air Stone 24/7 to increase oxygen in your
tank. Do a little water change (just a little) to increase PH level and
reduce CO2.




"David Wee" wrote in message
...

I took my readings today after having freshly installed the onyx Sand,
(im
using the Nutrafin "DIY" kit)..


My water straight from the tap: 7.6 pH
1 kH

After water is in the tank
(DIY co2, Onyx Sand) 6.3 pH
5 kH


Why is my pH so low? I heard Onyx Sand has inherent buffering properties
which would help to counteract the falling pH.

Tank is 10 Gallons, the possible reasons I can think are this:

(1) the Co2 Is not being used up fast enough by my "relatively light"
plant load?

(2) the 40 Watts of light are not helping the plants grow fast enough?

(3) A non-plant related issue? The only "chemicals" I used are AmQuel
(chlormaine remover) and TransClear (also by kordon, the thing that
makes
the water clear)


--