CO2 Drop Check and PH monitor - The Planted Tank Forum
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post #1 of 6 (permalink) Old 01-15-2020, 02:38 PM Thread Starter
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CO2 Drop Check and PH monitor

I have been using 2 co2 drop check on two tanks for over a year with the same liquid and it works fine. recently i completely re-did 120g with a SUMP. And its previous setup was with canister.

The CO2 drop check on 120g never changes the color. I places it on the back right, front right, and front left in conjunction with the return of Co2 reactor on the left back. on the other hand, my Marine PH monitor shows the decrease in PH by approx 0.5-0.7. The same drop check/liquid on my 30g is working fine. I replaced the liquid a few time already but it nerver shows the change of color.

Anyone knows the reason why or recommendation?

Thanks
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post #2 of 6 (permalink) Old 01-15-2020, 03:21 PM
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Set it up to drop pH at least 1.0 from injecting CO2.

That should get you close. Likely the sump is off-gassing a lot of CO2.

Work up to the 1.0 dorp slowly if you have livestock you're concerned about.

Ensure your pH probe is properly calibrated as well.

Remove the drop checker from this tank and try it in your other one, see if it works in one tank but not the other.
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post #3 of 6 (permalink) Old 01-15-2020, 05:42 PM
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Quote:
Originally Posted by Quagulator View Post
Set it up to drop pH at least 1.0 from injecting CO2.

That should get you close. Likely the sump is off-gassing a lot of CO2.

Work up to the 1.0 drop slowly if you have livestock you're concerned about.

Ensure your pH probe is properly calibrated as well.

Remove the drop checker from this tank and try it in your other one, see if it works in one tank but not the other.
Yeah I'm going through the same thing on my newly set up tank and I believe it's as simple as not putting enough Co2 into the system.
However it is a bit odd that the PH tells a different story then the drop checker in both the OP and my situations.
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post #4 of 6 (permalink) Old 01-17-2020, 01:35 PM Thread Starter
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Originally Posted by Quagulator View Post
Set it up to drop pH at least 1.0 from injecting CO2.

That should get you close. Likely the sump is off-gassing a lot of CO2.

Work up to the 1.0 dorp slowly if you have livestock you're concerned about.

Ensure your pH probe is properly calibrated as well.

Remove the drop checker from this tank and try it in your other one, see if it works in one tank but not the other.
the set up for this tank is kind of biotope, not many plants in it. All plants are easy ones such as crypts, sp repents, and buce. That is the reason i set PH drop approx 0.5 to 06 and i feel that it is enough for these plants and plant mass. The PH probe recently calibrated. The same CO2 checker with the same liquid is used in another tank (with no sump) shows changes in color.
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post #5 of 6 (permalink) Old 01-17-2020, 01:38 PM
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Originally Posted by houstonreef View Post
the set up for this tank is kind of biotope, not many plants in it. All plants are easy ones such as crypts, sp repents, and buce. That is the reason i set PH drop approx 0.5 to 06 and i feel that it is enough for these plants and plant mass. The PH probe recently calibrated. The same CO2 checker with the same liquid is used in another tank (with no sump) shows changes in color.
A drop of 0.5 in pH will not change the drop checker colour.

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post #6 of 6 (permalink) Old 01-17-2020, 02:45 PM Thread Starter
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A drop of 0.5 in pH will not change the drop checker colour.
Good to know that, i try to pump up CO2.
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