Ph Dropping!

-Mak-

Member
From what I've read, a ph drop from CO2 isn't anything to worry about, because it isn't a drop from a decrease in water hardness. Stable KH and GH are more important. Using baking soda is too sudden of a change.

Are you using a drop checker?
 
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Nellie75

Member
Well I only dosed baking soda for the amount of 10 gallons.

I'm using the API liquid test kit, so I shouldn't worry about the PH drop? Seeing the PH go from a light blue to light yellow scared me.

I just googled what a drop checker is...no I do not have a drop checker, I have a bubble counter that's outside the tank.
 

-Mak-

Member
Nellie75 said:
I just googled what a drop checker is...no I do not have a drop checker, I have a bubble counter that's outside the tank.
Bubble counters don't tell you how much CO2 is in the tank, it just tells you how many bubbles you're injecting. The CO2 levels depend on the type of diffuser, surface agitation, tank size, plant uptake, etc

I suggest you get a drop checker. You don't want to inject too much and gas your fish. A drop from 7.6 to 6 or lower does seem a bit much.
 

PilotWhale

Member
So, I added CO2 and I killed 9 fish. pH dropped 1.2, from 8.0 to 6.8. I'd be careful. Do it slowly, not like how I did it.
 

-Mak-

Member
PilotWhale said:
So, I added CO2 and I killed 9 fish. pH dropped 1.2, from 8.0 to 6.8. I'd be careful. Do it slowly, not like how I did it.
The ph drop is normal. Perhaps you injected too much?
 

Dcchillin

Member
I'm getting ready to start injecting co2 on my 20 gallon next week. Howuch pH drop should I expect? I haven't really been able to find any info on this and I want to make the transition as least stressful for me and my fish.
 

-Mak-

Member
Dcchillin said:
I'm getting ready to start injecting co2 on my 20 gallon next week. Howuch pH drop should I expect? I haven't really been able to find any info on this and I want to make the transition as least stressful for me and my fish.
Depends on your KH and other buffers in the water, but I think a drop of 1 is typical. It's not really stressful for fish because the ph drop isn't a result from a change in osmotic pressure.
 

Dcchillin

Member
Ok, thanks mak. Any advice on some further reading on this topic?

I know my kh is 5/6. I mix my own from ro so it can be adjusted if need be. I'm setting everything up later this week so I'd like to get prepared.
 

-Mak-

Member
Dcchillin said:
Ok, thanks mak. Any advice on some further reading on this topic?

I know my kh is 5/6. I mix my own from ro so it can be adjusted if need be. I'm setting everything up later this week so I'd like to get prepared.
You might know all this already, but here are some good solid basics:
CO2: Striking the balance

Tom Barr's website might have more on CO2 in planted tanks.
 

Dcchillin

Member
Thanks bud!

If I'm reading that chart right, my current water parameters of 5kh/7.6ph means only about 3.7mg/l of co2 in my water? Or is this chart not applicable to liquid co2?

If it is it might explain my miserable results so far.
 

-Mak-

Member
Liquid CO2 isn't really CO2 at all, so CO2 charts, drop checkers, etc don't apply.
 

ashenwelt

Member
-Mak- said:
Liquid CO2 isn't really CO2 at all, so CO2 charts, drop checkers, etc don't apply.
So for clarity, it's chemicals that some plants will break down for CO2, but not free CO2 for the test kits.
 

-Mak-

Member
ashenwelt said:
So for clarity, it's chemicals that some plants will break down for CO2, but not free CO2 for the test kits.
I'm not sure what exactly it does, but even if it does release CO2 (which I don't think it does) it's not enough to register on a test.
 

ashenwelt

Member
-Mak- said:
I'm not sure what exactly it does, but even if it does release CO2 (which I don't think it does) it's not enough to register on a test.
I believe it is Polycycloglutaracetal which has carbon for photocynthesis... but is a pain to break down. I just did a little research and found a nice article on it.

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