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Old 05-24-2020, 01:33 PM   #1 (permalink)
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Default about dropchecker

Hello,

I have a 300 liters tank. The PH is 7.4. I push CO2 into my tank 6 hours a day.
The dropchecker is always blue.

As the solution for dropchecker is like a ph test and my ph is always high, is it possible the drop check can work correctly ?


Thanks.
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Old 05-24-2020, 03:15 PM   #2 (permalink)
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Default Re: about dropchecker

Co2 should start about an hour before the lights come and run till the lights go off. Plants use Co2 from the moment the light comes on till it goes off. Depending on your lighting and your fertilizer use you can run about 4-6 bubbles per second. It also depends on how much surface movement you have the more you loos Co2.
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Old 05-24-2020, 03:18 PM   #3 (permalink)
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Default Re: about dropchecker

How are you diffusing your CO2? How big is your tank? What liquid is in your drop checker?
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Old 05-24-2020, 03:59 PM   #4 (permalink)
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Default Re: about dropchecker

As mistergreen alluded to, make sure your drop checker has 4dkh solution inside. If you're just using tank water/tap water with ph reagent (bromothymol blue), it'll probably just stay blue the entire time. There's a relationship between water hardness (dkh) and ph and the green/yellow/blue color guides we use for drop checkers only holds for 4 dkh water + ph reagent. Hope that solves your issue.
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Old 05-24-2020, 04:03 PM   #5 (permalink)
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Default Re: about dropchecker

Drop checkers were designed for measuring the pH of the water in an aquarium, and for that the drop checker was filled with tank water, with some pH test reagent in it. Used that way the drop checker color told you what the pH of the tank water was. But, the best way to use it is to put pure distilled water, which has just enough baking soda in it to make its KH a specific number, like 4 degrees of KH. You can also use it with that pure distilled water adjusted to have a different KH. See https://www.aquaticplantcentral.com/...8-diy-co2.html for more details. You can make the 4 dKH or other KH water with distilled water and baking soda. Search to find how to do so.
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Old 05-30-2020, 12:55 AM   #6 (permalink)
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Default Re: about dropchecker

Hello,

@Duckweed Hunter, there is a surface movement due the outflow canister on the left of my tank
The atomizer is in the middle of the tank
On the right of the tank, there is the inflow canister.
I have read master amano push 3 bubbles per second. 4-6 bubble is very high no ?
The bottle of co2 is 2KG, and i push co2 since 18 months. The bottle is not empty yet.

@mistergreen, i'm diffusing co2 with an atomizer. The tank is 300L (120cm*50*50)
The liquid in drop checker is co2 permanent test (reagent). In the manual , they say , add five drop of reagent, then add 2ml of aquarium water.

@neilshieh and @hoppycalif; so i understand that if i follow the manual i drop checker will still blue because the ph of my tank is 7.4-7.6.

If i use the reagent, i must add 2ml of this water 4dkh, maybe more ?
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Old 05-30-2020, 05:08 AM   #7 (permalink)
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Default Re: about dropchecker

Quote:
Originally Posted by bugpb60 View Post
Hello,

@Duckweed Hunter, there is a surface movement due the outflow canister on the left of my tank
The atomizer is in the middle of the tank
On the right of the tank, there is the inflow canister.
I have read master amano push 3 bubbles per second. 4-6 bubble is very high no ?
The bottle of co2 is 2KG, and i push co2 since 18 months. The bottle is not empty yet.
Yes, 4-6 bubbles is on the high side. But it depends on how much light and nutrients you have. The more light and ferts the more Co2 to balance the other two. The Co2 should be on the whole time the lights are on. If you shut Co2 off early the plants will use it up and the drop checker will turn blue. Co2 lowers your PH. So are you getting 7.4 ph with or without Co2 going?
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Old 05-30-2020, 05:58 AM   #8 (permalink)
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Default Re: about dropchecker

Yes, you'll need a 4dkH water in your drop checker...

You can double check the CO2 by testing the pH of your tank water before adding CO2 and a few hours into adding CO2. You should see a drop in pH.
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Old 05-30-2020, 06:54 AM   #9 (permalink)
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Default Re: about dropchecker

Quote:
Originally Posted by bugpb60 View Post
Hello,

@Duckweed Hunter, there is a surface movement due the outflow canister on the left of my tank
The atomizer is in the middle of the tank
On the right of the tank, there is the inflow canister.
I have read master amano push 3 bubbles per second. 4-6 bubble is very high no ?
The bottle of co2 is 2KG, and i push co2 since 18 months. The bottle is not empty yet.

@mistergreen, i'm diffusing co2 with an atomizer. The tank is 300L (120cm*50*50)
The liquid in drop checker is co2 permanent test (reagent). In the manual , they say , add five drop of reagent, then add 2ml of aquarium water.

@neilshieh and @hoppycalif; so i understand that if i follow the manual i drop checker will still blue because the ph of my tank is 7.4-7.6.

If i use the reagent, i must add 2ml of this water 4dkh, maybe more ?
https://www.aquaticplantcentral.com/...tml#post244534 is part of a long discussion about how drop checkers work. I just remembered it today.
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Old 06-01-2020, 01:30 AM   #10 (permalink)
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Default Re: about dropchecker

Thanks for your reply. I have made my own water with 4KDh. So i mixed three drops of ph tester with 3ml of water 4Kdh. The drop checker is still blue for the moment. I will wait a little.
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