Discussion Starter · #1 · (Edited by Moderator)
DIY Bicycle Pump Co2I know this is maybe now old news but I found out about co2 bicycle inflators and thought I’d try out a little co2 contraption myself. Please let me know if I’m doing anything silly. :laugh2:
The thinking was to use my sera Co2 reactor (which I already owned from a previous tank) and pimp it up to be used with the bike pump for manual co2 addition to the tank without the need for tablets and for injection straight into the filter for better diffusion.
• 1 Sera Co2 Reactor
• 6mm airline
• 1x Schrader Valve (from an old inner tube)
• 1x non return valve
• 1x regulator valve or clamp
• 1x Co2 inflator for mountain bikes and a 16g co2 refill.
• 1x All Pond Solution HOB Filter
I took the Co2 reactor and widened the central hole at the bottom of the reactor (just enough for 6mm tubing)
The airhole at the top (which comes with a plugger) should fit the 6mm airline snugly without need to widen with scissors.
I cut the valve out of the inner tube (secateurs worked well) and stripped back the rubber on the valve about 1.5cm to reveal that the metal underneath is just larger than 6mm… Heated the tip of the airline and squeezed on (eventually).
Two lengths of 6mm airline tubing.
The one attached to the valve should have plenty length for ease of adding co2. Cut and fit with a non- return valve to prevent water siphoning back down the line. This airline goes in the widened hole at the bottom of the reactor.
The other line is shorter (depending on desired length of reactor to filter with a regulator valve fitted in the middle. One end in the top hole of the reactor (with only a little in as you want the max amount of space in the reactor) and the other end connecting to the airline inlet of the filter.
The Bicycle Co2 Pump
I’ve ordered one with a regulator which I thought was a must to prevent the gas being expelled too strongly.
I've tested it by blowing air into the reactor and tweaking the regulator valve to get the slowest release possible, and seems to work really well but will had to wait until Wednesday for the bicycle pump to arrive for more tests.
That's it for now but if you have any tips or advice please let me know.
P.S I've turned a bit aquarium mad again since joining this site and I love it!
Thought i'd add a photo of an in-tank shot and one leading into the filter inlet allowing Co2 into the impeller. Trying to see how long it can take emptying the reactor but my guess is quite a long time... I Keep fiddling with it to see if it's still working and ruining my experiment haha.
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