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[APD] CO2 reactor help

I recently put together an external CO2 reactor as described here http://www.aquaticscape.com/articles/co2reactor.htm (except without the CO2 inlet as I plan to just keep adding the CO2 though my filter intake).

I connected it inline with the intake and started up the filter which ran for about 20 seconds and then gurgled, burped and airlocked. I could restart the flow by pumping the primer but it would always seize up again. So I disconnected it, restarted the cannister and everything is back to normal.

So why isn't it working? Is air sucking in somewhere? Is my pump to small/large? How can I get it working?

Filter is Hagen Fluval 204, rated at 680 lph (180 gph), height from pump to outlet is about 80 cm (2'7" or 31").


Clint Brearley
Melbourne, Australia

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