[FlyingHellFish]

I used to be the only one who built his own Co2 system but recommended retail. Why pay twice as much when you don't have too? Beside the quality and looks, they both do the same thing right?

Well, no.


A friend of mine started this hobby and got the Milwaukee, and surprise surprise, he too was faced with the same problems. His bps is day to day, and I can't imagine trying to grow plants when your Co2 supply is up and down.

But here the kicker, there are people with working retail kits. There are people with Milwaukee regulators who have great tanks.


Buy a retail kit from a source that has an easy return policy. Try it out, and see if you like the performance. The only hassle free method is buying, or building a Co2 system with parts made for scientific and medical research.

Here is what the "average" price for parts you need:

Regulator: 60 - 100
Needle Valve: 20 - 50
Fittings: 10 - 50
Solenoid: 20 - 60

Also, expect some sellers to label parts as "new old stock" which is basically "old, but I clean it with a rag".

To give you an idea on what condition regulators are sold as:
This regulator was label as used (honest seller) and if what you're buying looks worse than this, then it's super used.

 

[goneRogue]

The Milwaukee setup is a mediocre single stage regulator. You can build a superior unit for less fairly easily. Personally I'd go with a dual stage since it's only slightly more, but Tom Barr swore by the single stage regs for a while. Your biggest concern is getting a consistent bubble rate and a quality reg and needle valve are critical to achieving this. If the bubble rate fluctuates you'll have an algae farm on your hands.

I would skip the pH controller. All you need is a solenoid and a timer. I would go with a 20 lb co2 tank for that size aquarium.

 

[shutupandboard]

Thanks, I was hoping there would be kind of a "default regulator" that's good quality for good price.

So I would like to go with a two stage regulator then.

So no PH controller huh? Man, I would think that it would be perfect for keeping everything consistently stable.

username "AlenLe" pm'd me about something he has, so maybe I'll look at possibly getting something from him.

 

[ForensicFish]

The pH controller is designed to maintain a certain level of CO2 saturation. So in layman's terms, if you set your pH controller to a pH of 6.9 it will constantly shut on an off to maintain that pH regardless of whether the lights are on or off.

In a planted tank, plants take up CO2 during the day and release O2 at night. When there is no light for photosynthesis, CO2 intake from plants decreases to a significant degree.

CO2 injection in my opinion should not be used to maintain a constant pH level in your tank. It is meant to aid in plant growth. While the CO2 is running during the day, the pH in the tank will drop to a certain level based on how much CO2 you are injecting and then creep back up to the pH level before the CO2 injection started. Usually, this pH swing is around one full point (for example 7.0 to 6.0 then back to 7.0). Again this is all variable depending on the conditions of your water and how much CO2 you are injecting. Most fish will do just fine in a one full point pH swing over the course of 10 - 12 hrs and back again.

Discus will do better in water that is more on the acidic side, but CO2 injection should not be used to achieve this. It is best achieved by using RO water and discus buffer if need be. I was never a fan of using powdered buffers to achieve a certain pH, but reefing has taught me otherwise.

With discus, your main focus should be on large weekly water changes with RO water. Keeping proper temperatures in the 82 degree range and feeding them a healthy discus diet. I would also advise using plants that can tolerate discus temps.

In terms of purchasing a regulator, all I can say is read as many reviews on the products as you can. Unfortunately, you will find that every regulator has received poor reviews at some point. I have heard great things about Milwaukee brand and have heard awful things. The only consistent review I have heard about Milwaukee is their terrible, terrible customer service if something breaks or malfunctions.

I would skip the pH controller. All you need is a solenoid and a timer. I would go with a 20 lb co2 tank for that size aquarium.[/QUOTE]

+1 to this. Just use a timer and run your CO2 for X amount of hrs during the day and have it shut off completely at night.

 

[rezco]

pH controller

I like automation and would have gone with a pH controller too. Except the drop in pH is also tied to the KH/GH levels. So, its not possible to lock in a dissolved CO2 level on pH alone.

Then there is always the possibility of a miscalibrated pH probe gassing everything to death.

 

[goneRogue]

Thanks, I was hoping there would be kind of a "default regulator" that's good quality for good price.

So I would like to go with a two stage regulator then.

So no PH controller huh? Man, I would think that it would be perfect for keeping everything consistently stable.

username "AlenLe" pm'd me about something he has, so maybe I'll look at possibly getting something from him.

There's a few lists of which regulators to look for on this forum. Here's another one from the Barr report: http://www.barrreport.com/showthrea...regulator-part-numbers-sources-and-other-tips!

As long as you aren't picky about the exact model (and there isn't a reason to be as any 2 stage reg with the right specs is plenty good for our purposes) then you should be able to find one in good shape at a good price on ebay pretty quickly. Getting an already built one from a member is another good way to go.

I was going to go the pH controller route myself when I was building my system since I thought it'd be the best way to go. Turns out that isn't the case. Most people have better luck setting up a "simple" system and dialing in the bubble rate. The pH method is much more expensive and it's not nearly as accurate as you at first think. Then you also have to worry about calibrating the probes. My advice would be start without the pH controller and see how it goes. If you really want to add one later it's very easy.

The pH controller is designed to maintain a certain level of CO2 saturation. So in layman's terms, if you set your pH controller to a pH of 6.9 it will constantly shut on an off to maintain that pH regardless of whether the lights are on or off.

In a planted tank, plants take up CO2 during the day and release O2 at night. When there is no light for photosynthesis, CO2 intake from plants decreases to a significant degree.

CO2 injection in my opinion should not be used to maintain a constant pH level in your tank. It is meant to aid in plant growth. While the CO2 is running during the day, the pH in the tank will drop to a certain level based on how much CO2 you are injecting and then creep back up to the pH level before the CO2 injection started. Usually, this pH swing is around one full point (for example 7.0 to 6.0 then back to 7.0). Again this is all variable depending on the conditions of your water and how much CO2 you are injecting. Most fish will do just fine in a one full point pH swing over the course of 10 - 12 hrs and back again.

Discus will do better in water that is more on the acidic side, but CO2 injection should not be used to achieve this. It is best achieved by using RO water and discus buffer if need be. I was never a fan of using powdered buffers to achieve a certain pH, but reefing has taught me otherwise.

With discus, your main focus should be on large weekly water changes with RO water. Keeping proper temperatures in the 82 degree range and feeding them a healthy discus diet. I would also advise using plants that can tolerate discus temps.

In terms of purchasing a regulator, all I can say is read as many reviews on the products as you can. Unfortunately, you will find that every regulator has received poor reviews at some point. I have heard great things about Milwaukee brand and have heard awful things. The only consistent review I have heard about Milwaukee is their terrible, terrible customer service if something breaks or malfunctions.

Good point about getting plants that will tolerate the higher temps discus require. I disagree on the pH though. My father has had discus for years and they do just fine at higher pH readings.