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Discussion Starter · #1 ·
I am using an Apex Jr. controller sunrise/sunset option.

I have my CO2 come on 30 min before sunrise and turn off 60 minutes before sunset.

That said, when should my drop checker show green?
I just started so right now im only getting to about 15ppm.

Any tips greatly appreciated.

Thanks,
Ron
 

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Discussion Starter · #3 ·
It should be green by the time your lights come on. Then yellow-green by the end of the photoperiod. Depending on how you dissolve co2, you might have to have your co2 come on earlier. Just do your adjustments slowly and watch your fish.
Slow adjustment is key. :)

Right now its blue-ish green by the end of the day.
I have an atomic inline diffuser. I will upload some pics of the setup.
Right now its taking almost 10 hours to get blue-green at about 1 BPS.
 

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Since there is a delay in the change of the drop checker's color and it takes time for the CO2 to build up in the water you would probably at the maximum CO2 level a couple hours before lights on if the drop checker was showing blue green at lights on. Not really a problem unless the tank tends to be low in oxygen or you are trying to get as much out of the CO2 tank as possible.

Try taking a water sample from the tank itself at lights out and trying to get close to that level at lights on instead. That won't tell you how much CO2 is in the water as there are other substances in the water affecting pH but it will give you a relative amount. So if your water is 7.4 at lights out then you would like the water to be 7.4 at lights on.
 

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Discussion Starter · #8 ·
My tap water is normally 6.8/7.0.

That said my tank is ~6.6 at mid day.

I do have a circulation pump running 24x7 and it creates some surface current.

I have increased to ~1.5 - 2 BPS and will track it tomorrow.
I also enabled my CO2 to start 60 minutes before.
 

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Discussion Starter · #9 ·
My fish don't seem upset at all with the addition of the CO2 at that level. Would be nice to see more of a color change to be sure the drop checker is working.

Would investing in the pH controller add-on for the apex be worth it?
 

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Discussion Starter · #10 ·
I will report back to see how the extra 30 min and 1 BPS help out the coloration throughout the day. Thanks again for the help.
 

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I find that it takes a few hours for the inline-diffuser to change the drop checker.
 

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Discussion Starter · #12 ·
I find that it takes a few hours for the inline-diffuser to change the drop checker.
How many BPS and what size tank?

I would assume the inline diffuser would be extremely efficient.

Especially with the amount of flow I have in my tank.
2x Eheim 2217 and 1x 1600 JBJ Circulation Pump

Unless I am mistaken.

Thanks, this pressurized CO2 is very new to me.
I appreciate all the help!
 

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75 Gallon

I just put the solution in the drop checker that came with it.
Not quite sure what type of solution that comes with that dc. Might wanna ask who you bought that from.

The reaction time of a dc is slow but 1 bps in a 75gal sounds a bit low. I would try around 3-4 bps to start with. Best thing to do when adjusting co2, do it when you are able to be home all day. Use the dc to get close and then monitor the fish while you fine tune. Different tanks have different amounts of dissolved o2. Said tanks can handle more/less co2.
 

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Discussion Starter · #14 ·
Thanks I will keep a look see. I get the feeling that getting a pH controller is prob overkill with a dc. Might want to have it just in case as a fail safe.

If my normal pH is 6.8, tap water KH is 3.
Is it worth adding baking soda to up my KH or should I operate within the bounds of my tap water?

Thanks
 

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Discussion Starter · #15 ·
I have been taking pictures of my plants since I setup the CO2.
Some new growth but nothing explosive.

Hopefully something will be happening soon-ish.

I will report back on the DC today to see how it looks in an hour or so when the lights turn on.
 

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Thanks I will keep a look see. I get the feeling that getting a pH controller is prob overkill with a dc. Might want to have it just in case as a fail safe.

If my normal pH is 6.8, tap water KH is 3.
Is it worth adding baking soda to up my KH or should I operate within the bounds of my tap water?

Thanks
Nice water, a KH of 3 is ideal. You might want to get closer to a ph drop of "roughly" one whole point. Increase CO2 slowly over several days to get your ph to 5.8 by the end of the day. Keep that water pump running, the more O2 in the water, the more CO2 your animals can tolerate. I have a 57 gallon aquarium using an Ista Mix Max Reactor and the bubble stream through the bubble counter is uncountable. The 5 lb cylinder lasts 3 months so its working well. I have a kh of 4 and drop the ph from 7.6 to about 6.4 and the fish aren't breathing hard. Surface movement is important, don't minimize it hoping to save a little CO2 but, don't have it splashing either. That 4 kh drop checker water from Greenleaf is good to use. You probably want to see a little yellow by the end of the day.
 

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Discussion Starter · #18 ·
Thanks hbosman!

So if I recap:

1. Keep 1600GPH pump running pointed slightly at the surface to keep movement at the top. This will encourage O2 exchange, keep the tank rich in O2 and CO2. I might use a little more CO2 but that is fine.

2. I should be reaching pH of 5.8 not 6.6 by the end of the day with a slight yellow in the drop checker.

3. I should *SLOWLY* increase the BPS rate every few days until the desired drop checker level is reached.

4. I should note there is a 2-3 hour equilibrium delay for the CO2 to register with the drop checker. All changes should be made very gradually as to not stress the fish.

5. Fish are the best measures of CO2, never let them display signs of labored breathing.

6. Use a better fertilizer. (Currently using Kent Pro Plant)

Thanks,
Ron
 

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Discussion Starter · #19 ·
Here is my DC after 5 hours of being on.

I have also attached two pictures of new growth after 6 days of adding my CO2 setup.

The last shot is my pH of the tank after 5 hours of CO2 being on.

Before CO2: pH 6.8
After CO2: pH 6.6
Tap Water: pH 7.4
 

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Discussion Starter · #20 ·
Here is a pic from my DC at CO2 running for 8h.
As you can see even at 2 BPS I am not getting a large change in my DC.
 

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