Mattlikesfish36 Posted January 1 Share Posted January 1 I upgraded to the fluval 207 after using the 107 for about a year in my aquarium. I haven’t changed anything other than the canister filter itself, but my fish are showing signs of co2 overdose. My male apisto is hanging out at the top of the tank and my female is lethargic at the bottom. Would upgrading to a filter with more flow change the amount of co2 in the water? I am using an inline diffusor but I haven’t touched anything with co2 in weeks. Does the faster flow rate mean that more co2 gets into the water even though I haven’t adjusted my needle valve? I did a water change and have an air stone in the tank now Link to comment Share on other sites More sharing options...
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