The lamp should be 12-24 inches from the plants first of all. You can go by this or by the below chart. Depending on whether your growing bushes or SOG.

400 watt hps: 2.25 x 2.25= 5 square feet
400 watt mh: 2 x 2= 4 sq feet

600 watt hps: 3 x 3= 9 sq feet

1000 watt hps: 4 x 4= 16 sq feet
1000 watt mh: 3.25 x 3.25= 12.25 sq feet

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In the Sun
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hey southflorida, is there anyway to cheap out on a chiller? i got all the parts and tools i need to do this, im just not too interested in shelling out 7-800$ for a chiller..

Check this out by Filthy Fletch A DIY water chiller setup

The only other way is to get air cooled lights so that the heat does not disrupt the temps in the res.

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In the Sun
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thank you southflorida

no problem man

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In the Sun
The Universe Has Gotten Me This Far, May As Well Keep Going!!

yeah thanks this help...NON EXPERIENCED GROWERS NEED TO READ THIS..plus the faq

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i cant believe people actually believe that i grow, use, or smoke marijuana...dumbasses

i would just like to say thanks a lot to southfloridasean. my seeds sprouted n a matter of days thanx 2 your help

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i dont smoke or grow weed, i just have no friends and nothing to do with my time.
AceB07

No problem, happy to help you anytime

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hey southflorida, ive been doing research on co2, and id love to give it a try unfortunately i have funding only enough for 1 burner and monitoring system atm. I was wondering if co2 is better used in the baby/veg state or in the final budding stage and if i were to use co2 with the baby/veg would it be harmful to not use co2 in the budding stage after the plants have been in a co2 rich environment? Also if u know of any good brands or could recommend anything would be awesome! maybe a monitoring system too?


lol sorry for all the questions and tyvm for all the help uve been so far.

CO2 can be used for veg & flowering. Make sure to keep your ppm at 1500 thats really the only way CO2 will be effective. Also remember that fans can not exhaust while CO2 is being run. It will just waste the CO2 enrichment within the growroom. CO2 works best in a sealed growroom. But for this you will need aircooled lights or an ac within the room.

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In the Sun
The Universe Has Gotten Me This Far, May As Well Keep Going!!