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The new 7ft tank has been ordered, but they are holding off until I get back to them with where I want entry points for filter & C02 diffuser. Filter is a no brainer, as I will want them to enter at each end of the tank (there will be 2 eheim cannister filters on the tank), but I'm not sure exactly the best spot for the C02 diffuser. It is one of those Rhinox 5000 ones - sold on ebay a lot.

Where is the best spot? Any advice is appreciated.

Cheers
TW

Hi,
Those actually using the glass diffusers will probably
be more help. Especially those using them in large tanks
such as this one.
In theory, you want the bubbles to be very
fine (small) so that the tank currents carry them around
the tank instead of allowing them to rise rapidly to
the surface to break.
The longer the bubbles are below the surface, the more
efficient the exchange of CO2 gas, to the water. Depending
upon the output of the filters, you may have to add a power
head somewhere around the middle of the tank to "Goose"
the currents and keep the bubbles in suspension.
Or, you may consider two of the diffusers, one in the
output stream from each filter.

Frank


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