New Grower Help NEEDED, Can't get a good yield from my 400w hps setup

[400w wizard]

thank you ripster for your advice, i do have a digital thermometer and humidity sensor and its 22 degrees duing lights on with 20% humidity at night it drops to 17 degrees.
Ill have to invest in a ph tester asap if it going to help.

My light is approx 20 cm from the top of my tallest plant

 

[Torched]

What area are you trying to cover with your light? Under my 400w I get 4-6 plants max. I could barely squeeze 5 3-gallon pots under mine.When you say the light is 20 cm from your tallest plant, how far away is it from the average size plant? Temperature are also important I have a hard time keeping my space warm enough with only a 400 going and you are much more north then me. One other thing I noticed is you only list Biobizz Bloom but not Grow. I believe both need to be in conjuction as the bloom is not a "complete" nutrient in its self are you using both?

 

[400w wizard]

I'm using a dr90 street which is 90x90x180,
my height on average is about 30cm max and temps are in between 82 - 87 degrees.
You are right i've run out of bio grow but ive just been using bottled tap water, left open for 2 days to try to lose all the chlorine in it(well some of it at least).

Im such a boob!!!

I NEED TO BUY SOME MORE BIO GROW AND TO FILL MY POTS:booya:

 

[JbBurnin]

Do whatever you were doing when u used cfls, just don't keep the light near as close with the hps.

Good luck with everything bro, sounds like u have a hold on things.

 

[Monkeypox]

4" ruck fan, sucking fresh air into my tent.

Make the fan suck air out and it will help drop your temps .

 

[ripster]

thank you ripster for your advice, i do have a digital thermometer and humidity sensor and its 22 degrees duing lights on with 20% humidity at night it drops to 17 degrees.
Ill have to invest in a ph tester asap if it going to help.

My light is approx 20 cm from the top of my tallest plant

Anytime man...:thumbs:

Now 22 Celsius is 71.6 Fahrenheit and for a high, that's almost to cold man...17 C= 62.6 F and that's definitely to cold...

And yes, you have to give them veg. nutes, buts really if your using new commercial potting soil, they'll veg. feed for at least one month probably two with their nutes. For most of the strains I've grown, I usually try to get in two veg. feedings before the flower feeding starts...

Here's a link to the Ph tester I use. It's a good one and easy to use. Not saying you have to buy from worms way, but it you get it else where, just make sure it reads the +/- 0.01 not 0.1.....
http://www.wormsway.com/detail.aspx?sku=WPHT500

 

[ripster]

but ive just been using bottled tap water, left open for 2 days to try to lose all the chlorine in it(well some of it at least).

:booya:

Have you tried buying $0.88 gallon bottled water from Walmart? It's safer than tap water. I know all my little helpful hints seem to cost money. But in the long run, you making money...

99.9% of most store bought water has been through reverse osmosis so there clean....And just for you knowledge, drinking water is made to be as close to 7.5 Ph as they can. That's peoples Ph #...So store water alone, will need to be brought down. So I also suggest with the meter, some PH + and Ph - along with some Ph buffer 7.01 and 4.01 for calibrating the meter.
Well, that might do you for a while man. Happy to spend your money for ya...

 

[JM]

yeah... get a ph Meter ASAP!!!! thats very very important... equally as light and temps... and rip's right... temps gotta be on target too...

also lots of info at : https://www.autoflower.org/f7/announcements.html

hang in there... we'll work ya through it!

:smokebuds:

 

[Scott817]

I was reading through this and see one thing everyone is missing although temp, soil, and ph are are very imortant lets take a step back

You said you are only getting around 2/3 a oz with HPS

You said you were doing better with CFL with the same soil, ph , nutes, temps ect.

OK whats the difference? Just the light right? Sooooooooooooo what bulb are you using?

Is it old?

Is it the proper spectrum?

After 6 months or so they need replaced to be the most effective especially with Autos and having the lights on longer. I come from the salt water industry and we have to change out our MH or HPS bubls about every 6 months to keep the corrals happy. Its a total drag but older bulbs the par drops off and the corrals will die off. Its pretty expensive to change 3 250W MH bulbs at a time but it is necessay.

Thats about all I can come up with from a quick read but this could be your issue.

 

[JM]

great point scott... I hadnt thought to ask... I assumed the fixture and bulb were new..