First 5x5 grow critique

Best wattage bulb for a 5x5 space

  • 1x 1000w

    Votes: 1 20.0%
  • 2x 600w

    Votes: 4 80.0%
  • 1x1000w + 100-300w LED

    Votes: 0 0.0%

  • Total voters
    5

kstoco16

Member
Hey all. I recently moved to Colorado and plan on exercising my right to grow marijuana for personal use. I have permission from my landlords to grow indoors however I need to control the smell and can't modify the property. Here is my plan so far, critiques encouraged:

5'x5' Gorilla Grow tent
1x 1000w HPS bulb, digital ballast, air cooled hood (enclosed or open?)
8" 200+ CFL fan and ducting
Carbon filter
Negative pressure ventilation to a nearby window
Foxfarm OF soil
3 or 5gal smart pot style containers
General Hydroponics veg (and bloom later on) fertilizer
Small oscillating fan for air movement within tent
pH up and down

I will have all of the grow (Veg and Bloom tents) on a single 20amp circuit that also runs to my and my roommates bedrooms, however neither of us run anything over 200w total each on the circuits. By my calculations there should be plenty of spare capacity. And if necessary I can set up the veg tent on another circuit but it would not be in my ideal location.

I plan on doing a perpetual harvest style grow, with a new plant entering the flowering tent every week for a total of 8 or 9 plants in the flowering tent at any given time.

I plan on beginning the plants on several spacers and removing the spacers as the plants grow so they remain 2-3ft below the 1000w lamp.

I'm asking for critiques in general but I also had a few questions:

Is there enough room in a 5x5 for 9 plants in a perpetual harvest style soil grow?
Are there any common issues with a perpetual harvest style set up?
Would i be able to go with 2x600w HPS bulbs instead of 1x1000w HPS bulb (I'm thinking for a more dispersed coverage, more lumens per watt, and the ability to get the bulb closer to the plants for better penetration, and simply adding a few thousand extra lumens)
Am I able to add additional lighting to the flower tent, probably a high quality 200w LED or something as I need to keep my total lighting on this 20amp/120v circuit under 1400-1600w.
Is a 200 CFL fan and filter combo enough to manage a 5x5 flower tent. Keep in mind I have the ability to vent it outdoors if necessary.

Any comments would be helpful. Thanks for the time
 

Cx2H

Well-Known Member
1x 1000w HPS bulb, digital ballast, air cooled hood (enclosed or open?)
Open is great for spectrum, bad for 105+ degrees in tent.
8" 200+ CFL fan and ducting
8" is more like 720cfm ... 5x5x7 is 175c ft
Carbon filter
Yes
Negative pressure ventilation to a nearby window
What?
Foxfarm OF soil
3 or 5gal smart pot style containers
General Hydroponics veg (and bloom later on) fertilizer
Personal preference...
Months = gallons
Personal preference...
Small oscillating fan for air movement within tent
Try 4 on the corners?
pH up and down
Really gonna use both at the same time? Really?
I will have all of the grow (Veg and Bloom tents) on a single 20amp circuit that also runs to my and my roommates bedrooms, however neither of us run anything over 200w total each on the circuits.
Forget wattage concerns and plan for amperage
1000w Ballast will do 9-12 amps alone so you try to on the same circuit; plugs are melting or tripping breakers.
C-Fans are about .9 amps
Computers, TV's, random house sheet, sheety lines in house... etc

Would i be able to go with 2x600w HPS bulbs instead of 1x1000w HPS bulb
Yeah use a splitter on the 1000w ballast and run 2 lamps from one @ 600w each. OR use XXXL type hood that will cove the whole 5x5
I need to keep my total lighting on this 20amp/120v circuit under 1400-1600w.
It's Melting! Amperage.
Is a 200 CFL fan and filter combo enough to manage a 5x5 flower tent.
200 CFL's?
Old Timer once told me:
#Big 3
Ventilation
AirFlow
Light
Keep in mind I have the ability to vent it outdoors if necessary.
Love walking down a street locating all the grows with my nose..

That will be 125$ for consulting fees... J/k
Hope any of that helps the headband made me do it.;)
 
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kstoco16

Member
Does the carbon filter + ventilation system not scrub the smell completely? Negative pressure just means the ventilation system pulls air out of the tent constantly creating a negative (low) air pressure within the tent thus preventing non-filtered air leakage through the tent because air travels from high pressure to low pressure and not the other way around, the only air exiting the tent would be through the filter. With positive pressure the air would be more likely to escape in other places as well as through the filter/ventilation system. https://www.google.com/?gws_rd=ssl#q=negative+pressure

I used this calculator http://www.rapidtables.com/calc/electric/watt-volt-amp-calculator.htm to find my maximum wattage at 120v so I don't overload my 20amp circuit. Meaning i can add up all of the wattage requirements for what i'd be running at 120v and calculate my maximum safe wattage. At 20amp circuit the most i'd want to use is 16amp so 16amp x 120v = 1920 total wattage safe limit. If I keep my usage under 1920 watts on this circuit I shouldn't melt anything correct? Did i make an error somewhere in my calculations? I've used 2000w on that circuit before (space heater = 1500w) with no trips or problems. I get issues on my other 20amp circuit when i have my 1500w space heater, 1100w microwave and other appliances running.

No i do not intend on using pH up and pH down at the same time, but i'm assuming i want the ability to manipulate the pH in both directions to keep it within 5.5-6.5.

Thanks for the advice on the splitter, i'd really like to get 1200w on the plants if possible. 1200w/25sq'= 48w/sq' which i believe is within the optimal-saturation zone.

I'm also a bit confused on your critique of my vent fan specs. Are you saying 200 CFL is ok? 6"?

I'm considering doing ScrOG as well but ideally I'd like to harvest every week or two.
 
Last edited:

Cx2H

Well-Known Member
What are the wall sockets rated at? 15A residential or 20A commercial?
I change sockets so much I feel like a jr electrician now. I even keep an inventory of them too now.

Those sockets fried with a 1000w digital and few fans over a period of time from heat.

I like all those words and numbers though.

And Welcome
 

kstoco16

Member
the breaker box says 20A, its in my home. i'm assuming its 120v

*edit I'm not sure what the sockets are rated but i've run my 1500w space heater on a socket for 12h with no issues. you're saying they wear out with the constant usage? i'm assuming its a fairly non-invasive repair?
 
Last edited:

Cx2H

Well-Known Member
the breaker box says 20A, its in my home. i'm assuming its 120v
No worries. Guess I should of asked what country you were in but here is an example and sorry if I am incorrect on anything above.

"The maximum allowed by the electrical code for a standard North American wall outlet is 12 amps, which is 80% of the 15 amp circuit breaker trip point. The electrical code requires that a known load may not exceed 80% of the rated capacity of the wiring feeding the load. The 14 gauge copper wire feeding the outlet circuit is rated 15 amps capacity. The code rates each wall outlet and light fixture at 1 amp, and 12 items is the maximum number of these which may be connected to a single circuit. Reasonable electricians will then design their wiring scheme so there is a maximum of 8 or 9 outlets or light fixtures on a new circuit to provide for in future the customer wanting additional outlets installed in a room, the circuit can be extended by 4 added outlets or light fixtures without needing to run new feeders back to the main panel. The "12 items maximum" rule does not apply in the case of definite known loads, which must be counted as whatever their rating is. For example, a large chandelier fixture may carry 500 watts of light, so must be counted as 500/120 = 4.17 amps, meaning that circuit can only supply an additional 7 outlets or standard light fixtures. Ditto for e.g. 30 watt mini-potlights, where 12 of them in a kitchen décor will only add 360 / 120 = 3 amps to a circuit, allowing an additional maximum of 9 outlets or standard fixtures on the circuit."


the breaker box says 20A, its in my home. i'm assuming its 120v

*edit I'm not sure what the sockets are rated but i've run my 1500w space heater on a socket for 12h with no issues. you're saying they wear out with the constant usage? i'm assuming its a fairly non-invasive repair?
Takes like 10 mins max as long as you turn off the breaker. Cost like 1-2$ for basic socket
 

kstoco16

Member
The circuit is labeled as 20A. So 80% of that is 16A safe usage, which is what i used in my calculations. Are you saying that I would want to limit my usage on a single outlet to 9amps?
 

Cx2H

Well-Known Member
Bro just setup and make sure it is safe is all I am stressing. You seem to be well aware of that aspect of it, where some think they can create the sun in a house and not watch it burn. I check heat on plugs and cords now if running 120V every few days by touch. It's all a learning process really and fun along the way.
 

kstoco16

Member
Ok. I appreciate the advice. I'll run my 1500w space heater for 12h and feel the outlet for heat. I'd imagine that would be a decent indicator for if it's overloading the outlet.
 
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