4 32 site xl undercurrent systems in a 20X40 room

[Pawnee]

How many de 1000 watt gavitas should i run? It calls for at least 32 lights right? How much air conditioning will it require? 15 tons? Or should i run 20 tons ( 4 5ton mini splits) to account for dehumidifier and co2 generator?

Im trying to open up a medical grow in oklahoma and needing to order up the equipment.
Also what is the best rez to use with a 5 ton ×ater chiller? For sure need something insulated. What are people using?

Im trying to run 4 ucdbxl32s

I'm in Oklahoma as well. Gonna fallow this and asksome questions aswell.

 

[bdt1981]

So i actually planted them on the 13th of oct evening time. So i was off a day or so. Pix of Day 9 after transplant into uc. Did a bit of trimming. any leaves that needed gone are gone.

 

[bdt1981]

Hope i didnt fuck to much up by topping them today. They should be fine i think.

 

[bdt1981]

Day 15 after ph drop of about .5 in over 24 hrs i did like a 99% change out. Half stregnth ppm at 210 and ec .4. Can that be right? The chart says week 3 420ppm and .6 ec. Since im half the ppm dosent it make it half the ec? Apparently not.
They seem to be fine but like a few slh felt the burn of high ppm. Damm humidity is bs right now at like 35% had to spray water on the floor to bring it up to 55%. Prob look into a humidifier tomorrow.

 

[Renfro]

The chart says week 3 420ppm and .6 ec.

Those numbers aren't the same.

 

[Renfro]

dunno what chart you are using but if 210 PPM is half strength it seems weak to me personally.

 

[bdt1981]

Those numbers aren't the same.

I got to read up on ec more.

 

[bdt1981]

dunno what chart you are using but if 210 PPM is half strength it seems weak to me personally.

This one.

 

[bdt1981]

I got to read up on ec more.

Im gun shy right now on my first run. Initally i was plannin on following directions but more than one person said over 500 will start to burn. And cch2o says with hyper airation reduce ppm by 1/2

 

[Renfro]

As long as you don't see any deficiencies then all is well. When I ran DWC with GH 3 part I ran around 1000 PPM full strength.

There are some errors on that chart with the EC / PPM

 

[bdt1981]

I have a question for ya. Would you be worried about humidity being 30-35%? Like to the point of need to fix right now or is it something that you would just eventually fix?

As long as you don't see any deficiencies then all is well. When I ran DWC with GH 3 part I ran around 1000 PPM full strength.

There are some errors on that chart with the EC / PPM

 

[Renfro]

Well, humidity being too low, other than stressing the plants, can cause PM to pop up easier if the RH% rises. PM likes fluctuations of temp / humidity. So I get concerned if one of my swamp coolers goes down as they are my humidifiers hooked to an autopilot. I really like to stay around 40 - 45 % in flower and around 55 - 60 percent in veg / stretch.

 

[bdt1981]

What is PM?

 

[Renfro]

Powdery Mildew

 

[ttystikk]

Well, humidity being too low, other than stressing the plants, can cause PM to pop up easier if the RH% rises. PM likes fluctuations of temp / humidity. So I get concerned if one of my swamp coolers goes down as they are my humidifiers hooked to an autopilot. I really like to stay around 40 - 45 % in flower and around 55 - 60 percent in veg / stretch.

The operative word here is 'stay'. Having RH go up and down a lot is ideal for the spread of powdery mildew.

@Renfro you know this, I'm just driving the point home for those who may not.

 

[bdt1981]

I have been curious as to when i should add in the top off res. It just seems like it wouldnt be needed at first since the roots are small. Ill have to make sure i log the water level this evening and see where it ends up in the morning. I think they took up about 1 1/4" of nutes in 24hrs. Cant be for sure since i didnt make a note. Definatly past time for top off res. Not sure how much water that would be in gallons but i was 1 3/4" up net pot and today the bubbles were about bottom of net pot. Ok i tried to figure it on paper at about 40 gallons of water in 24 hrs. More than i would have thought.

 

[bdt1981]

Ok so night before last my ph started dropping. Down to like 4.8 over night so i put some up in the doser and it gets locked at 6.0. Its 6.1 today with only 1 dose of ph up. Seems like it stabilized for now.
The slh really disappointed me. They cant handle 200 ppm nutrient. Oh well now i know not to use them anymore. Im a little nervous about flipping to flower. I guess the older a plant gets the more nutes they can handle right?
Anyway here todays pix. They really grew a lot since last night. Ppm was 210 went down to 140 i brought it back up to 210. Might go ahead and flip tomorrow since it will be day 21 veg

 

[bdt1981]

@Purpsmagurps i have had no issue keeping the system at 65-68f using stainless steel wort chiller. All 32 sites.
I remember you saying that it would be warm a few buckets into the circulation.

 

[Mikenike]

@Purpsmagurps i have had no issue keeping the system at 65-68f using stainless steel wort chiller. All 32 sites.
I remember you saying that it would be warm a few buckets into the circulation.

What temp water are you running thru your wort chiller? I’m trying to dial my smaller system in and have just got my wort chiller. But I also use my cold water res to cool my room

 

[bdt1981]

Might be difficult to keep in check when using your water to cool other things. Used to do ebb n flo with water cooled ice boxes and went ahead and threw a coil in res to keep water fresh. It worked so so. I set mine at 55. I have about 125 gallons of water in it and some expensive sticky insulation stuff. But it is consistantly. 64-68f daily. Thats with lights at 115%. Room right at 78-81f. Humidity has been constant 35%. Ugh...
Im anxious to see if the 1.5 hp is enough to cool 3 systems.