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Old 09-17-2008, 08:59 PM   #11 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

If you set the regulator and needle valve to the bubble rate that gives you the amount of CO2 in the water that you want, it will remain that way until the CO2 tank runs out of liquid CO2 or until the solenoid fails, if you use one. But, if you use a pH controller you have to set the needle valve and regulator to give more than enough CO2, or the controller never does anything. Then if the controller or solenoid fails too much CO2 is supplied continuously to the tank, killing the fish. It is safer without the controller.
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Old 09-18-2008, 01:06 PM   #12 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

I completely agree with Hoppy. I now use a solenoid and needle valve to shut off the CO2 at night. I also used to just run CO2 24/7 and I did not have any problems with my fish.
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Old 09-18-2008, 04:18 PM   #13 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

I agree too. Make sure you get a good regulator with quality needle valve so your adjustments stick.

A sponsor on this forum has this regulator available.

I would use an AquaMedic 1000 reaktor with Eheim Pro II filter.

My Pro II works fine with the AquaMedic and the Hydor ETH both inline.
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Old 09-20-2008, 07:20 AM   #14 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

As usual, I do not agree with anyone here.

Firstly. I have a pH controlled CO2 system and it is working great. For those people who say that CO2 doesn’t change you pH much let me point out that I am running a 4 gH, 2 kH tank and when I turn off the CO2 the pH goes to about 8.0 with CO2 "on" and CO2 at about 15 -20 ppm, the pH is 6.7. (facts not stuff off the top of my head).
If you are going to run a planted aquarium you will not want a lot of phosphates in your water anyway; so, they are not a problem with pH. Check you kH and PO4 regularly and get an extra hand held pH meter. The handheld and tank meter need to be calibrated regularly against reference solutions (which are an expense item along with an occasional new electrode).

There are some things about the AP system that I don’t like.
The reactor has to be in your tank and is big and ugly. Find one that works in-line. If you can switch to the AP.com “Best regulator in the world” do that. It can regulate the CO2 flow better.

Even with the AP.com system “as is” you will have way more control over your aquarium.
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Old 09-20-2008, 07:22 AM   #15 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

Quote:
Originally Posted by ray-the-pilot View Post
As usual, I do not agree with anyone here.
I would advise everyone to take a looksie at previous posts and make his/her own best decision...haha
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Old 09-20-2008, 07:41 AM   #16 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

In my personal experience, I have found that the simpler you can make it - the better.

I use a pressurized system with a 5 lb bottle, Milwaukee reg and a glass diffuser. I have a timer set for the Co2 to come on 30 minutes before the lights do and shut off when the lights shut off. Photoperiod is 10 hours a day - 5 on, 2 off, 5 on. I run at about 130 - 140 bpm, with a Co2 ppm of 24 - 28.

pH controller seems like overkill to me (from what I have read). But the great thing about this hobby is that there are many ways to get basically the same result and what works well for some, may not work as well for others.

I agree - experiment and find what is best for you.
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Old 09-20-2008, 07:46 AM   #17 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

[QUOTE=ray-the-pilot;416470]As usual, I do not agree with anyone here.

Firstly. I have a pH controlled CO2 system and it is working great. For those people who say that CO2 doesn’t change you pH much let me point out that I am running a 4 gH, 2 kH tank and when I turn off the CO2 the pH goes to about 8.0 with CO2 "on" and CO2 at about 15 -20 ppm, the pH is 6.7. (facts not stuff off the top of my head).
If you are going to run a planted aquarium you will not want a lot of phosphates in your water anyway; so, they are not a problem with pH. Check you kH and PO4 regularly and get an extra hand held pH meter. The handheld and tank meter need to be calibrated regularly against reference solutions (which are an expense item along with an occasional new electrode).

There are some things about the AP system that I don’t like.
The reactor has to be in your tank and is big and ugly. Find one that works in-line. If you can switch to the AP.com “Best regulator in the world” do that. It can regulate the CO2 flow better.

Even with the AP.com system “as is” you will have way more control over your aquarium.[/QUOTE


It's O.K. do disagree, but it is a FACT that a ph controller is not needed in planted aquaria. Your proof is right hear at APC. The majority of folks do not use them and have great success long-term as I have. IMO it is another device that needs to be setup, maintainted and could possiblly malfunction. It is safer and more reliable to simply have your co2 shut off at night via the solenoid that is included with most regulators. This way the fish are not at risk during the evening when the plants aren't using the co2. My co2 out of the tap is around 7.5 and drops to 6.5 during the later part of the day. In the morning the ph is somewhere inbetween. It is a myth that a change in ph itself is dangerous to fish. BTW - Most folks here do a 50% wc weekly, what do you think happens to the ph when you add the new water. I have never had a problem and as I stated my ph out of tap is 7.5 and my peak co2 ph is around 6.5.
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Old 09-20-2008, 03:49 PM   #18 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

Quote:
Originally Posted by ray-the-pilot View Post
As usual, I do not agree with anyone here.

Firstly. I have a pH controlled CO2 system and it is working great. For those people who say that CO2 doesn’t change you pH much let me point out that I am running a 4 gH, 2 kH tank and when I turn off the CO2 the pH goes to about 8.0 with CO2 "on" and CO2 at about 15 -20 ppm, the pH is 6.7. (facts not stuff off the top of my head).
If you are going to run a planted aquarium you will not want a lot of phosphates in your water anyway; so, they are not a problem with pH. Check you kH and PO4 regularly and get an extra hand held pH meter. The handheld and tank meter need to be calibrated regularly against reference solutions (which are an expense item along with an occasional new electrode).

There are some things about the AP system that I don’t like.
The reactor has to be in your tank and is big and ugly. Find one that works in-line. If you can switch to the AP.com “Best regulator in the world” do that. It can regulate the CO2 flow better.

Even with the AP.com system “as is” you will have way more control over your aquarium.
It's ok ray, we don't agree with you either.

Believe it or not there are a few pioneers and experts in the hobby that are on here, some of the best in the country(no I do not think I am one). We are not all idiots. With some listening and humility you might learn something.

Last edited by chagovatoloco; 09-20-2008 at 04:52 PM..
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Old 09-20-2008, 04:43 PM   #19 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

I have a 75 gal and dont use a pH controller. My water here is very soft and the softer the water and less alkalinity (KH) the lower the pH will run. I think a lot of members here forget what works in their tank won't in another because of the vastly different parameters water can have. You just need to regulate the CO2 flow properly. I also no longer use my solenoid as the pH fluctuated too much using it. Again, you need to balance the regulator and needle valve to achieve the desired level. I use a grounding probe in my tank and this renders a pH controller useless for correct readings. The amount of phosphate that you should have in your tank should not be an issue with pH devices. The drop checkers have the same issue with phosphate as a ph meter.

KIS = keep it simple. As Houseofcards and others said, its just another thing to keep up and another item that could break.

Last edited by Newt; 09-20-2008 at 05:08 PM..
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Old 09-20-2008, 05:02 PM   #20 (permalink)
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Default Re: CO2 system suggestions for a 75gl tank

Quote:
Originally Posted by Brilliant View Post
I would advise everyone to take a looksie at previous posts and make his/her own best decision...haha
Of course you can take anyone’s advice but let me point out that none of the other people posting about pH controllers have one. (If they did they wouldn’t make some of those laughably ignorant posts. Some of these people don’t even know how the equipment works).

If anyone on this thread actually OWNS a pH controller and had a problem with it I would seriously like to hear about it.

BTW how do you get to the Jedi level of experience and not have a pH controller?
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