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When is the best time to complete a water change?

I read recently that is a good time at lights out. I'm still doing mine when I please but I only do 5 gallon every otherday:)
 
I wait til my lamps reach ramp down Andy, about 9.30pm which means a pain if trimming etc to do as well (which there usually is!). On a weekend i do maintenance in the morning well before lights/co2 on.

Rob
 
According to craig the best time is just before lights on this if im remembering right is so the plants can access the air this inturn gives them a big boost of co2 and kick starts them, although there was also some mention of it not really mattering when you do it, the most important thing is to do the water change,

I cant find the thred so am righting this to the best I can remember
 
Glass cleaning :mad:
 
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