The Rex Reactor

Leebee · 06-13-2012, 01:27 AM

Thanks guys, great answers. I worry that the flow will be reduced too much on the output side of my canister. I don't think it would get that blocked from dirt on the input side, no more than any other part would.

Leebee · 06-15-2012, 07:07 AM

Another question, I don't think we have 1.75 inch pressure pipe here. I can get 50mm, or 30mm, 1.75 inch is about 43mm, we don't have that in Australia. My eheim canister is rated at 1050lph, any ideas on pipe size?

TheNamelessPoet · 07-15-2012, 04:22 PM

so am I to understand (sorry for the dumb question) that the co2 is entering from the LOW end and water is flowing from the HIGH end to the LOW end?

I am far from a plumber and fomr wome reason this setup doesn't seem to do anything lol. I know it does its raved about I am just trying to understad the basic physics of it...

Mark Fisher · 07-15-2012, 04:34 PM

This design provides for a counter-current flow, i.e., the CO2 bubbles are going up while the water is being pumped down. The CO2 will dissolve quickly in a counter-current flow.

TheNamelessPoet · 07-15-2012, 04:49 PM

Quote:

Originally Posted by Mark Fisher

This design provides for a counter-current flow, i.e., the CO2 bubbles are going up while the water is being pumped down. The CO2 will dissolve quickly in a counter-current flow.

Ok it makes a little more sense now thank you. Ug I feel like I am in a fog today.

Aquaticfan · 07-15-2012, 05:57 PM

It's actually just basic physics. Gas rises water pressure forced down. The 2 going against each other with enough contact time causes the co2 gas to dissolve in the water and it then will exit the reactor.

You want the co2 inlet just about midwayish down the reactor. To low and the gas will escape into the tank to high not enough contact with the water to dissolve. Length of the reactor and diameter depend on flow of water. More flow larger reactor. I would say 2" at 18" is a good start point for most.

**herns** · 08-19-2012, 09:15 PM

Does Rex still exist in TPT? His last post was 2010. His web has a forum too but was ghost town.

Aquaticfan · 08-20-2012, 01:43 AM

Hey Herns.

Nope, Rex has been missing for sometime. Last info I had on Rex was health issues caused him to no longer be involved in the hobby. His website will be up til it expires. But no one should try to buy anything from his site as you won't get it.
sent from my HTC EVO 3d

06-13-2012, 01:27 AM	#196
Leebee Algae Grower (View User Tanks) PTrader: (0/0%) Join Date: Apr 2012 Location: Australia Posts: 37	Thanks guys, great answers. I worry that the flow will be reduced too much on the output side of my canister. I don't think it would get that blocked from dirt on the input side, no more than any other part would. __________________ Lee

06-15-2012, 07:07 AM	#197
Leebee Algae Grower (View User Tanks) PTrader: (0/0%) Join Date: Apr 2012 Location: Australia Posts: 37	Another question, I don't think we have 1.75 inch pressure pipe here. I can get 50mm, or 30mm, 1.75 inch is about 43mm, we don't have that in Australia. My eheim canister is rated at 1050lph, any ideas on pipe size? __________________ Lee

07-15-2012, 04:22 PM	#198
TheNamelessPoet Algae Grower (View User Tanks) PTrader: (0/0%) Join Date: May 2012 Location: Windsor, CT Posts: 142	so am I to understand (sorry for the dumb question) that the co2 is entering from the LOW end and water is flowing from the HIGH end to the LOW end? I am far from a plumber and fomr wome reason this setup doesn't seem to do anything lol. I know it does its raved about I am just trying to understad the basic physics of it... __________________ My new tank from the ground up

07-15-2012, 05:57 PM	#201
Aquaticfan Wannabe Guru (View User Tanks) PTrader: (12/100%) Join Date: Oct 2011 Location: USA Posts: 1,200	It's actually just basic physics. Gas rises water pressure forced down. The 2 going against each other with enough contact time causes the co2 gas to dissolve in the water and it then will exit the reactor. You want the co2 inlet just about midwayish down the reactor. To low and the gas will escape into the tank to high not enough contact with the water to dissolve. Length of the reactor and diameter depend on flow of water. More flow larger reactor. I would say 2" at 18" is a good start point for most. __________________ Sun Sun pimp #72 RAOK CLUB # 68 Conway

08-19-2012, 09:15 PM	#202
herns Planted Tank Guru (View User Tanks) PTrader: (161/100%) Join Date: May 2008 Location: Los Angeles Posts: 2,465	Does Rex still exist in TPT? His last post was 2010. His web has a forum too but was ghost town. __________________ *#23* *VTS-253A-320, VTS 253A-1993* Eheim # 371 Ecco 2232 Classic 2213 "No CO2/poor CO2 & high light/ ferts = great way to grow algae" - Tom Barr**

07-15-2012, 04:34 PM	#199
Mark Fisher Algae Grower (View User Tanks) PTrader: (0/0%) Join Date: Dec 2011 Location: Rockport, Texas Posts: 75	This design provides for a counter-current flow, i.e., the CO2 bubbles are going up while the water is being pumped down. The CO2 will dissolve quickly in a counter-current flow.

08-20-2012, 01:43 AM	#203
Aquaticfan Wannabe Guru (View User Tanks) PTrader: (12/100%) Join Date: Oct 2011 Location: USA Posts: 1,200	Hey Herns. Nope, Rex has been missing for sometime. Last info I had on Rex was health issues caused him to no longer be involved in the hobby. His website will be up til it expires. But no one should try to buy anything from his site as you won't get it. sent from my HTC EVO 3d __________________ Sun Sun pimp #72 RAOK CLUB # 68 Conway

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