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Re: [APD] Re: CO2 probe & inline heater/sumpeople find differences

This suggests that your set-ups before and now have about
the same efficiency using CO2. This could mean that the
sump set-up you have doesn't shed a lot of CO2 or that the
set-up you had before was moderately inefficient so that
changing to a sump didn't have much impact.

If you care to, try halving or doubling the water flow rate
and see what happens, then let us know. :-)

Also, do you track how long you go between CO2 refills?
That reveals a diff in CO2 use rates better than any other
measure, provide ambient temps (which can affect CO2 flow
rates) are relatively the same during comparison periods.

What's you CO2 level? Measured with a pH monitor or
chemical pH test kit?

Btw, unrealted question, what mechanical filtration
medium/media do you use?

Scott H.

--- Kenneth Ho <kennethhtp at singpao_com.hk> wrote:
> I have recently added a sump to my 200 gal tank which I
> also use pH
> controller to regulate CO2 injection. The frequency of
> the pH controller
> hasn't changed much, at least not that I can tell any
> difference. But then
> the flow is relatively small compare to a proper sump, it
> flows just about
> 400 gal/h.

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