I wouldnt trust any calculator that claims to know how many bps it takes to reach a certain ppm.
All bubbles are not created equal. Both the working pressure and the resistance at the diffuser/reactor, whatever, affect how big or small the bubbles are.
Also it should be obvious that how many bps a particular tank needs depends on how efficient the diffusion method. The better the diffusion, the less co2 is wasted, hence less is needed to reach the desired concentration.
Having said all that, .2-.3 bps likely isnt near enough for a 10 gal to reach 30 ppm. 1-3 bps should be closer to the ballpark.
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