whats a good amount of co2

[tallslim]

when enriching your plants with co2 whats considered a good amount for deep saturation. i was thinking of three times a day for thirty minutes at each feeding using a 20 gallon tank and a injector kit. Is it possible to over feed them

 

[nobogart]

1500ppm is perfect i think. some people push it to 2000 ppm.
normal air has about 350ppm.
remember increased co2 also means increased humidity.
only supplement in lights on condition. plants give off c02 at night.
good rule of thumb is wait a half hr after lights on to begin supplementation and stop 1/2 before light out.

hope i covered it all.

 

[tallslim]

nice, well i want to feed them during a time in the day when i can turn off the fans and exhaust so i was thinking of three times a day for thirty minutes at each time. thanks for your knowledge.

 

[tallslim]

can you tell me if a 65 watt compact flouresant with 4500 lumens is ok to vegg for the first three weeks or is that not enough?