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Hello all, i'm setting up my 1st 168l planted tank with C02, i've been running a 57l planted tank for a while without C02 and standard lighting.
The new tank has the Fluval plant spectrum led which i plan to run one of the natural light programs, on the smaller tank i would generally put the lighting on for 8hrs but with the natural programme on the fluval it seems to run longer and closes off with a sunset mode.
Does anyone run this type of system and what times do you set your C02 for to run alongside it..?
 

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I have a pair of Fluval 3.0 on a 36" 75g. I run CO2 to drop the pH 1 point from the overnight high, controlled by a pH probe. I try to keep KH about 5, so pH maxes out at about 7.3 and the CO2 brings it down to 6.3 when the lights are on.
 
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