[APD] RE: Daily pH swings and see saws

["Thomas Barr" <tcbiii at earthlink_net>]

Maggie, if you raise the CO2 levels to 30ppm before the lights come on,
then it drops to 19ppm after the lights lights go out, you will be fine.
18-7= 11ppm decline.

This is why I suggest a CO2 range of 20-30ppm and to account for some error
in test kits for pH/KH.

Regards, 
Tom Barr



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