Injection of CO2 into Aquaclear 300

>From: Marty Durkin <durkin at stsci_edu>
>Date: Tue, 13 Feb 96 13:39:55 EST
>Subject: Re: Aquatic Plants Digest V1 #251
>> I was using a power head to run it, and I had all these hoses running from
>>the power head, to the reaction chamber hung on the back of the tank, and
>>then back into the tank again. To tell you the truth, I thought it was ugly,
>>and a little too noisy as well. Now I just inject the CO2 into the inlet of
>>my Aquaclear 300, and it does the job just as well, and it is much quieter.
>>When and if I ever get my trickle filter set up, I'll get out my DIY CO2
>>reaction chamber and set it up as well.
>>Jay Bickford
>When you say that you inject the CO2 into the inlet of your Aquaclear
>300, what are you referring to?  Are you talking about the piece on
>the intake tube that sticks through the filter lid?
>Marty Durkin

I'm sorry I took so long to respond, but I hadn't been able to read my
E-mail for about the past week.

No, I didn't inject the CO2 through the piece that sticks through the lid,
as that is just a small handle to allow you to move the siphon tube back and
forth over the impeller to aid in getting the siphon started. I instead used
a piece of the stiff plastic tubing that is sold for use in undergravel
filter lift tubes and made a 90 degree elbow in the tubing using a lighter
to heat up the tubing to soften it up first. I then drilled a hole the same
size as the OD of the stiff tubing in the side of the siphon tube near the
lower end just above the grate, and inserted the stiff tubing through the
hole. The Co2 then bubbles into the water as it is taken up by the filter. I
also use a DIY bubble counter in the CO2 line before the filter input to
allow me to count the bubbles a little eaiser.

I hope this helps.



Fort Smith, Arkansas.