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Old 09-05-2012, 11:40 PM   #5
aweeby
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Hm, If you haven't bought anything yet, I would just go for one of those hagen mini internal HOBs. It would be cheaper. Or you could get a mag 12 for 18$ or so and have that to power an external reactor. You can have a bit more flexibility, IMO. Or you could cut a hole in the intake of the HOb and feed co2 directly into the filter, but you'd have to raise water level to avoid excessive agitation. I'd get rid of the airstone. THe following link should help you out with the ferts. http://calc.petalphile.com/
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