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Discussion Starter · #1 · (Edited)
I need to buy my CO2 tank here in the next few days. I think I am going to order it online, found for around 105 bucks, free shipping, this is for 20# tank.

Anyone have any suggestions on where to buy dual stage regulator from, that ready to go? I don't want to have to make any changes to it, I want to be able to connect it and plug in and be good to go.

Thanks
 

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Look through the for sale forum. I think there's a few that haven't sold yet.
Those are overprice that ppl trying to sell you with SS build, I recommend you build your own, it does not have to be very precise for our plants application. Unless you have shrimps that are super sensitive, then go for a better cv rate needle valve. Bettatail has a writeup of different needle valve you can use.
 

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20s are harder to get filled in my area. I had one welding shop that could fill for me and then they stopped. Ended up having to go to a swap and drop place and would had to give up my nice new 20lb tank, or wait a week to get it filled. 10 and below are very easy to get filled.

What size fish tank?
 

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Discussion Starter · #11 · (Edited)
20s are harder to get filled in my area. I had one welding shop that could fill for me and then they stopped. Ended up having to go to a swap and drop place and would had to give up my nice new 20lb tank, or wait a week to get it filled. 10 and below are very easy to get filled.

What size fish tank?
Tank going to be around 200 gallons + 75 gallon sump
 

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greenleafaquariums.com has plug and play regulators but I just took a look and got sticker shock and remembered why I built my own regulator. If you are willing to pay though, that's a pretty good way to go. They even sell complete systems that includes the tank.
Also, as someone else suggested already, look in the classifieds.

For the tank, get the biggest tank that you can fit since the price to fill bigger tanks aren't that much more than smaller tanks so you might as well try and get more for your money.
 

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Discussion Starter · #13 ·
greenleafaquariums.com has plug and play regulators but I just took a look and got sticker shock and remembered why I built my own regulator. If you are willing to pay though, that's a pretty good way to go. They even sell complete systems that includes the tank.
Also, as someone else suggested already, look in the classifieds.

For the tank, get the biggest tank that you can fit since the price to fill bigger tanks aren't that much more than smaller tanks so you might as well try and get more for your money.
ouch, sticker shock, you can say that again.
 

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The cost to build this system is less than $140.

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You know that and I know that (and it can even be a lot cheaper ;)) BUT
I want to be able to connect it and plug in and be good to go.
doesn't allow that really.. ;) It was my only point..

But WAIT...
Free CO2 resistant tubing
..............
 

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Discussion Starter · #18 ·
You know that and I know that (and it can even be a lot cheaper ;)) BUT


doesn't allow that really.. ;) It was my only point..

But WAIT.................

I guess I said plug and play is because I have no idea how to build it, and don't want to get it wrong. I do have a friend that manager of welding supply store, that can get me everything at cost. I do want something that high end, that will last a long time, I just don't even know where to being. :help:
 

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I guess I said plug and play is because I have no idea how to build it, and don't want to get it wrong. I do have a friend that manager of welding supply store, that can get me everything at cost. I do want something that high end, that will last a long time, I just don't even know where to being. :help:
Well that is half the battle. Get any 2 stage regulator that is set up for CO2 (CGA 320) inlet.( I once read there is no such thing as a bad 2 stage regulator.. ;))
Only thing critical here is to make sure outlet pressure has a good range.. say 0-100psi.. Many CO2 injectors like 35psi or so to function properly
A tank that is the size you want..
Get a relay that, according to most here, has a low Watt draw.. (<8W or so???)
Get a timer to run the power for the solenoid
Get a very fine metering needle valve..
Tubing, bubble counter, check valve and some method of pumping the CO2 into the tank water (diffusion disc, in-line atomizer or reactor are the 3 choices)

Read this:
http://www.plantedtank.net/forums/showthread.php?t=148509

Doing all new and at cost will set you back, guessitmating, about $300



INSERT solenoid valve between regulator and needle valve
NOTE: reactor is only one option..

Create parts list w/ help from your welding person.. Check list here for advice on selections before ordering..
optional fun parts are pH controller to shut off the CO2 if pH starts to spike. (or maintain a range)
CO2 checker

ALSO try to make sure most of the parts fit together relatively easily.. i.e try to standardize fittings..actually a bit harder than it sounds... Ideally if everything was, say 1/4NPT you just wrench it all together..
When you cobble things togethr you get like mine.. 1/4NPT to 1/2 NPT back to 1/4NPT to 1/8 NPT to Hoke gyrolok to 1/8npt to 1/16 hose barb.. :)
 
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