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post #1 of 14 (permalink) Old 10-30-2015, 07:53 PM Thread Starter
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upside-downside?

I have a 125 and 55 in very close proximity.
What is the downside to sharing the c02? ie....today the 125 gets it, tomorrow the 55 gets it.....

The upside is ; I don't have to deal with a splitter or a 2nd system.

North Dakota
125 planted, angels, rummies, c02 tank
72 bow, mystery snails and angels
55 planted, yellow neon shrimp
55 shrimp tank, rcs
29 shrimp tank, blue- not sure what kind
40 long - winter koi home
40 breeder- planted
10- nursery
10- quarantine
5.5- cycling to be another shrimp tank...
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post #2 of 14 (permalink) Old 10-30-2015, 08:40 PM
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Algae nightmares would be the downside


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post #3 of 14 (permalink) Old 10-30-2015, 08:46 PM
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Quote:
Originally Posted by bsherwood View Post
I have a 125 and 55 in very close proximity.
What is the downside to sharing the c02? ie....today the 125 gets it, tomorrow the 55 gets it.....

The upside is ; I don't have to deal with a splitter or a 2nd system.
Another downside... Constantly switching...Algae blooms... Potential for more leaks from disconnects and reconnects constantly...

40g Breeder "High-tech" tank
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post #4 of 14 (permalink) Old 10-31-2015, 01:21 AM
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Plants utilize the carbon in CO2 to build new tissue. CO2 is the easiest form of carbon for plants to use. Thats the reason we see such great growth from CO2 injection. Simple stuff right?

What happens when plants don't have the CO2 to use as a carbon source? This is where you problem lies. Plants have to extract carbon from other sources. To do that they have to manufacturer enzymes to extract the necessary carbon from other sources. This enzyme is also a pretty expensive stuff to make for the plant. It uses a lot of energy to do so.

When plants have high levels of CO2 they decide they don't need this enzyme anymore. They stop producing it. If the CO2 levels drop again they ramp up production. That process takes a couple of days for plants to manufacturer these enzymes.

So basically, your telling your plants "hey guys here is all the CO2 you can eat". They stop production and suck it up. Now when you remove the CO2 they starve because they don't have adequate carbon without this enzyme. About half way through producing enough you throw CO2 back at them. Well, they're not rocket scientists. So they do the same thing over and over.

I think the same phenomenon happens with DIY or poor CO2 deliveries. Plants never have a stable ground to adjust to. SO they do worse with poor CO2 delivery than they would without it. Algae are quick adapters. They can take advantage of it when it's there and switch gears in a few hours when it's not. I wonder why we see algae with poor CO2?

Your'e better off using the CO2 on one tank until you can properly do both. Otherwise they both will suffer in my opinion.
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post #5 of 14 (permalink) Old 10-31-2015, 02:42 PM
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Similar situation as the OP, I have a 40 gallon and a 75 gallon tank next to each other. I want CO2 in both. Solution, 1 tank, 1 regulator, 2 solenoids, 2 metering valves, 2 cerges reactors. Problem solved.


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post #6 of 14 (permalink) Old 10-31-2015, 02:55 PM
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I went this route: GLA PRO-2 CO2 REGULATOR

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post #7 of 14 (permalink) Old 10-31-2015, 03:00 PM
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Another good option argus


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post #8 of 14 (permalink) Old 10-31-2015, 03:39 PM
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Assuming you're using a diffuser (which is a bit small for a 55g, and really small for a 125g, but something is better than nothing). Also assuming you have a rig that includes a mounted needle valve and a bubble counter.
Simple and cheap-ish suggestion:

Required purchases:
5-10' tubing
inline bubble counter
diffuser
1 x 1/8" NPT tee, 1M 2F ports
1 x Fabco-Air NV-55 needle valve ($23.05 + shipping)
2x 10-32 to 1/8" barb
1x 1/8" NPT to 1/8" barb

Remove the current needle valve.
Attach the tee to the port the needle valve occupied.
Replace the needle valve at one end of the tee.
Attach the 1/8" barb to the other end.
Attach the two 10-32 to 1/8" barbs to the NV-55.
Run tubing to the NV-55, and from the NV-55 to the diffuser.

The NV-55 is inline, so no need to worry about mounting it. Alternatively, you can buy the NV-55-18 with 1/8" NPT ports and mount it instead of running it inline, but it's an extra $14 or so. The NV-55 is a decent needle valve, and you'll have a jumpstart for when you upgrade your system (which you'll eventually do).
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post #9 of 14 (permalink) Old 10-31-2015, 04:40 PM Thread Starter
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Excellent information! thank you all. I think I am going to leave it on the 55 dirted set up. That is the "new" tank and I have never done dirt before.

I will probably purchase an entirely new set up for the 125. Kevmo911- you suggested a the need for more co2 delivery in the 125?
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post #10 of 14 (permalink) Old 10-31-2015, 04:49 PM
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Quote:
Originally Posted by bsherwood View Post
I will probably purchase an entirely new set up for the 125. Kevmo911- you suggested a the need for more co2 delivery in the 125?
It's just hard to adequately dose a large tank with a diffuser, which is why many people switch to reactors. An Atomizer-type diffuser might work. But don't take my word for it - if your drop checker shows you're getting enough CO2, ignore me.
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post #11 of 14 (permalink) Old 10-31-2015, 09:43 PM Thread Starter
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Ok, so I am now shopping for another regulator. Anyone have a favorite? Amazon has an aquatek for under 90 bucks.
as long as my wife is already upset I might as well keep the UPS guy wearing out a path to my front door.

North Dakota
125 planted, angels, rummies, c02 tank
72 bow, mystery snails and angels
55 planted, yellow neon shrimp
55 shrimp tank, rcs
29 shrimp tank, blue- not sure what kind
40 long - winter koi home
40 breeder- planted
10- nursery
10- quarantine
5.5- cycling to be another shrimp tank...
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post #12 of 14 (permalink) Old 11-01-2015, 01:21 AM
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Quote:
Originally Posted by bsherwood View Post
Ok, so I am now shopping for another regulator. Anyone have a favorite? Amazon has an aquatek for under 90 bucks.
as long as my wife is already upset I might as well keep the UPS guy wearing out a path to my front door.
Read the reviews. The Premium AQUATEK CO2 Regulator only gets five stars from 47%. Lots of people have had issues. So, you probably have around a 50/50 of getting a problem free unit that will be good over the long haul.

In reading reviews of different brands I came to the conclusion that the less you pay, the greater the risk of problems. You pays your $$ and takes your chances.
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post #13 of 14 (permalink) Old 11-01-2015, 02:04 PM Thread Starter
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Excellent point Argus!

North Dakota
125 planted, angels, rummies, c02 tank
72 bow, mystery snails and angels
55 planted, yellow neon shrimp
55 shrimp tank, rcs
29 shrimp tank, blue- not sure what kind
40 long - winter koi home
40 breeder- planted
10- nursery
10- quarantine
5.5- cycling to be another shrimp tank...
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post #14 of 14 (permalink) Old 11-01-2015, 03:07 PM
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Quote:
Originally Posted by kevmo911 View Post
It's just hard to adequately dose a large tank with a diffuser, which is why many people switch to reactors. An Atomizer-type diffuser might work. But don't take my word for it - if your drop checker shows you're getting enough CO2, ignore me.
I agree on a tank that size normal diffusers will have problems. Go with an inline reactor, you will be much happier.
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