To CO2 Or Not
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Old 05-17-2013, 07:54 PM   #1
peaches3476
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To CO2 Or Not


Just upgraded my low tech discus planted tank. Added new big canister filter, lighting and all was great! Decided to get more plants and aquascape and bought pressurized CO2 and started it up after extensive research. My discus hate it! This morning I woke up to fish loss! Now, I'm afraid to use it! On another forum (that I love by the way), their opinion was split between NO CO2. And switching the Discus and Rummynose tetras with my dwarf cichlids to get CO2 regulated...I don't want to lose either of these tanks of fish!!! I have 9 tanks, but not sure how to arrange them as all are occupied and I can't mix the Discus with any other of the tanks....help! Give up on show tank idea?
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Old 05-17-2013, 08:04 PM   #2
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Dont run CO2 or get a needle valve after the CO2 split so you can individually adjust each co2 line to multiple tanks. All depends on your lighting
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Old 05-17-2013, 08:45 PM   #3
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First, you don't run you CO2 at night. I can't see how you can lose a fish at night due to CO2, unless CO2 was on. Obviously, get a drop checker and keeping the color greenish.
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Old 05-17-2013, 09:33 PM   #4
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No split, just going in discus tank. Also, didn't run CO2 at night. Only when lights were on and then off for the night and airstone on. My fish just hated it...turned darkband hid a lot for first hour or so, then would begin rapid breathing and gasp for air at top of tank.

Oh, forgot to mention...have drop checker. Never got to lime color...stayed from very dark green to teal.

Last edited by Darkblade48; 05-18-2013 at 11:39 AM.. Reason: Please use the edit function for back to back posts to keep threads cleaner
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Old 05-17-2013, 09:37 PM   #5
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Ur sure thats CO2 right? I say, if you are seeing negative affects from fish at even small CO2 levels, just don't use it. Keep in mind drop checker takes 2-3 hours to even change.
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Old 05-17-2013, 10:36 PM   #6
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I run co2 24/7 and my fishes are doing fine. It helps stabilize the pH level.
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Old 05-18-2013, 03:43 AM   #7
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A lot of people who keep discus use CO2 but don't inject as much as with other fish (read: less expensive fish). To my very limited knowledge on discus, I don't think CO2 is any more of an issue than most other fish but if you are starting out with CO2, play it safe. Don't use it if that's how you feel or start very slowly. Then inject less of it in general. Eventually you will find the balance but too little doesn't hurt fish, going to far the other way...different story.
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Old 05-18-2013, 04:57 AM   #8
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Default Re: To CO2 Or Not

Discus have a higher level if co2 intolerance then almost any other fish I've ever kept. Some of that is due to gill flukes common in discus. Even if the fish is fluke free, damage to gills is irreversible. Start very slow and have good surface agitation. Watch the fish, nothing else.

It is doable, takes some patience.

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Old 05-18-2013, 09:35 PM   #9
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Quote:
Originally Posted by tetra73 View Post
First, you don't run you CO2 at night. I can't see how you can lose a fish at night due to CO2, unless CO2 was on. Obviously, get a drop checker and keeping the color greenish.
It it perfectly fine to run co2 at night. Its all a matter of preference. Many don't because to them its a waste if the plants aren't using it.....

Quote:
Originally Posted by AlanLe View Post
I run co2 24/7 and my fishes are doing fine. It helps stabilize the pH level.

..........I second this. I have always ran my co2 at night due to ph stability. CO2 is cheap. Its not a waste if you want stable parameters. It also boils down to what fish you keep and the volume of water in which co2 has to diffuse in.

If a tank isn't low tech, I would always lean towards co2 in my tanks. Plants really benefit from it and boost the overall health of your tank. If the plants are thriving they increase the fish comfort zone In turn your happy. You just need to find your threshold to what your fish can tolerate and back it down.
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Old 05-18-2013, 10:31 PM   #10
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Default Re: To CO2 Or Not

One thing to consider is that plants stop producing o2 and start producing co2 at night as part if their resperation. If a tank is heavily planted that switch is significant.

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Old 05-18-2013, 11:11 PM   #11
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Yea i agree, last thing you want is to gas the fish on accident overnight. How many times do we kill fish via CO2 vs pH?
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Old 05-20-2013, 11:41 AM   #12
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Default Re: To CO2 Or Not

Quote:
Originally Posted by peaches3476 View Post
This morning I woke up to fish loss! Now, I'm afraid to use it! On another forum (that I love by the way), their opinion was split between NO CO2.
The lives of the fish and the qualify of advise is what matters at the end.
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