Another way to determine CO2 in our tanks

[Sleepy_lancs]

Hi Guys,
I need some help from the old thread. I started my tank with ADA Amazonia (first time with ADA product), my PH before CO2 injection is about 6.7, KH = 4. If I push for 1.7 drop, it would PH = 5. Wouldn't it be too low? Should I raise the KH which or should I stop at PH 6.2 as described in the above posts. Comments are welcomed.

[milk_vanilla]

Ph is not toxic, where as co2 is does. Meaning if you pull the ph till 5, but your fish is fine i suggest you keep that way. More co2 is better for plants, don't limit your co2.

The only limitation is your fauna, since it's considered toxic for them

[Sleepy_lancs]

Ph is not toxic, where as co2 is does. Meaning if you pull the ph till 5, but your fish is fine i suggest you keep that way. More co2 is better for plants, don't limit your co2.

The only limitation is your fauna, since it's considered toxic for them

Hi Milk_Vanilla,
Thanks for the update.

I have another question, I took a sample of the water out of the tank and shake it up and left it outside for 1 hour, then I tested the PH = 7.8. Should I use this value 7.8 and compare it to when the co2 was injected into the tank or Should I stick to my above where it was 6.7 before co2 injection within the tank and compare it to when the co2 was injected? I found it a little strange since I understand that ADA will buffer the PH but I don't expect the buffering be gone after I shake the water up. Isn't the disparity too great? Any kind soul able to explain this to me?