I posted photo in my tank journal, but thought it would also benefit in the equipment forum for people searching down the road…
Thanks to @Yugang for developing this concept.
I am converting my tanks to Horizontal reactors for CO2 injection.
Eliminates the visible microbubbles in the tank.
Greatly decreases risk of accidental overdosing of CO2 to the tank, as excess injection of CO2 makes large bubbles that float to thesurface quickly and disperses quickly.
Eliminates need to clean ceramic diffuser element, bleaching and dechlor….
Under $30.00 for a 75 gallon tank assuming you already have an inline co2 diffuser…
Basically a horizontal reactors for functions by having a controlled surface area of 100% CO2 over the top of a moving body of aquarium reactor. The surface area controls the ppm of co2 that will be absorbed by the water, just like it controls the rate of outgassing from your tank.
The formula for determining size of reactor is to take the length multiplied by the front to back width of the tank and divide by 17.7.
L X W/17.7
Then determine the internal diameter of the pipe you are planning on using.
Surface Area of reactor chamber divided by length= internal diameter
SA/L=D
Which algebra converts to a more useful SA/D=L.
On my 75 gallon tank, 46.25x16.25=751.563
751.6/17.7=42.463
42.5/2=21.25
So I used 2 inch PVC drain pipe, 21 inches long.
10 ft of PVC was $13.00
$2.60 worth of pipe
2 2” PVC couplers at 2.18 each
$4.36
2 2” - 1 “ reducing bushings. 3.10 each
$6.20
2 1” to 3/4 threaded bushings. 2.78
$5.56
My Oase Biomaster 350 hoses fit snugly over a 3/4 inch Pex Hose barb and will be secured with Stainless hose clamps.
2 3/4 MPT to 3/4 PEX adapter $3.81
$7.62
2 stainless hose clamps $1.88 ea
$3.76
2 2” pvc j hook hangers, 1.38
$2.76
$32.86 total cost, at least in March of 2025. With inflation and tariffs marching on it could be twice as much in a few years.. or months… who knows…

I used 2 pvc jhook hangers to mount to inside back wall of my cabinet.

Thanks to @Yugang for developing this concept.
I am converting my tanks to Horizontal reactors for CO2 injection.
Eliminates the visible microbubbles in the tank.
Greatly decreases risk of accidental overdosing of CO2 to the tank, as excess injection of CO2 makes large bubbles that float to thesurface quickly and disperses quickly.
Eliminates need to clean ceramic diffuser element, bleaching and dechlor….
Under $30.00 for a 75 gallon tank assuming you already have an inline co2 diffuser…
Basically a horizontal reactors for functions by having a controlled surface area of 100% CO2 over the top of a moving body of aquarium reactor. The surface area controls the ppm of co2 that will be absorbed by the water, just like it controls the rate of outgassing from your tank.
The formula for determining size of reactor is to take the length multiplied by the front to back width of the tank and divide by 17.7.
L X W/17.7
Then determine the internal diameter of the pipe you are planning on using.
Surface Area of reactor chamber divided by length= internal diameter
SA/L=D
Which algebra converts to a more useful SA/D=L.
On my 75 gallon tank, 46.25x16.25=751.563
751.6/17.7=42.463
42.5/2=21.25
So I used 2 inch PVC drain pipe, 21 inches long.
10 ft of PVC was $13.00
$2.60 worth of pipe
2 2” PVC couplers at 2.18 each
$4.36
2 2” - 1 “ reducing bushings. 3.10 each
$6.20
2 1” to 3/4 threaded bushings. 2.78
$5.56
My Oase Biomaster 350 hoses fit snugly over a 3/4 inch Pex Hose barb and will be secured with Stainless hose clamps.
2 3/4 MPT to 3/4 PEX adapter $3.81
$7.62
2 stainless hose clamps $1.88 ea
$3.76
2 2” pvc j hook hangers, 1.38
$2.76
$32.86 total cost, at least in March of 2025. With inflation and tariffs marching on it could be twice as much in a few years.. or months… who knows…

I used 2 pvc jhook hangers to mount to inside back wall of my cabinet.




