Heath's Perpetual Harvest.

I just got a new meter that does EC, PPM (both) and CF. SO you could reference the table on the meter and find that EC 1.2 is 600 ppm, which to me seems alittle low. But, I'm not doubting the results in any way!!! LOL


This is just my first day actually testing my new meters so I think thats correct.

 

Gotcha


Now I understand.


What kind of meter did you get? The 20 dollar stick on ebay?

 

Well EC = ElectroConductivity.


Just guessing, but his probably uses a .7 conversion factor, where yours is using a .5 conversion factor Rky. That would make his PPM about 840.


That cola on the scale I am sure is wet. WHen it dries it will be around 125 grams or so. Just over a 1/4 lb. Seen it many times, not impossible for sure.


Nice lookin haul Heath.


One question. Which set up is looking to yield the most for you? The top feed or the DWC?


Cheers

 

I was under the impression that EC is associated with PPM .5 and CF is associated with PPM .7.


I got the Bluelab Truncheon meter that does CF and EC PPM's


I'm still very new to this sort of thing, but it seems like the EC's have a decimal point and CF's don't, ie: EC of 1.2= PPM 600 and CF of 12 (without the decimal point) = PPM 840. So that tells me that CF is the .7 conversion and EC is the .5 conversion.


It sure makes alot more sense the way your explaining it, Useless. But, I'm stuck thinking the actual conversion of EC should be with a decimal point therefore making it the .5 version of the conversion.


I think I just confused myself. LOL


I curious to see what the real deal is.

 

It's simple. EC or CF to TDS/PPM can use either. Some meters use a .5 conversion. Some use .7 conversion. Check your meter to know what it is.


Two different meters can give you two different TDS or PPM readings of the same solution.


If you have a meter using .7 conversion, a 1.0 EC or 10 CF would be 700 ppm. Using the .5 conversion, it would be 500 ppm. This is why EC or CF is more of an accurate reading than PPMS. Since TDS and PPM are derived from an EC or CF reading, and a conversion is used, and depending on the conversion used determines the accuracy of the PPM or TDS reading. The standards at most universities I believe is .65 BTW.


Difference between EC and CF as you pointed out is a decimal place, or a factor of 10. Not the same as the conversion factor.

 

The reason I say this is because my meter has a scale that shows the EC and CF on two separate sides of the meter.


The EC side shows the .5 and the CF side shows the .7, so I assumed, and yea I know all about assuming, that the .5 wouldn't be associated with the CF and the .7 wouldn't be associated with the EC.


I totally appreciate your tutoring Useless, I really think your a treasure trove of knowledge and I want to explore that knowledge myself. But, in the process I also want to explore my feeble minded attempts at science.


So, please don't let me annoy you, just tell me to "shut up thats how things are!"

 

Ok, I totally understand most of this except why we even use a scale such as PPM, thats not standardized as opposed to a scale such as EC thats cut and dry?!?!?!


I'm assuming, again, that Useless is using the .7 version and if I'm trying to determine the EC for the Useless 3 part GH recipe, I'd be using the .7 scale?!?!?!


I think I'm gonna try to use EC from now on. It seems so much easier to understand for the slow stoner mind I seem to have acquired over the years.


Thanks again Useless for all your useful info! I truly appreciate it!

 

Awesome grow Heath, I've been a fan of your work for quite some time. I've been following this thread, but I just realized I never posted anything. Keep up the awesome work, and I look forward to seeing more of your killer Blackrose. Tree or sog, I'll be camping out for front row tix to the show.


-tC

 

Yea, I don't mean to take away from this kick ass thread . . . I got sidetracked.


I know I mentioned it before, but AWESOME grow show Heath.


I'm sold on the DWC systems!!!

 

Ya me also, I asked the question and thank god someone got it "RkyMtnWayHigh69". Cause I still got to figure it out. I just wanted to know what nutes he used and if it was full strength, but the EC screwed me up.


It's getting crowded in the front row I am going to tuck in the second row....seets are filling up. assit:

 

Hi HeadCase, blah blah boy, Game Theory, ofo, ResinRubber, RkyMtnWayHigh69, Useless and theCarpenter


I don't mind a good debate especially if something is learned from it :thumbsup: I have already posted up the yield off the first tank which was 26 0z there isn't much difference in yield between the tanks, the main benifit to using the small pots has been in reducing the amount of clay pebbles I use by a 5th.


I always us EC to show my nutrient concentrations as it is a universal reading which needs no conversion factor and means the same no matter which meter you use. CF is also standardised.


Here is a chart which shows you the EC readings compared to PPM's you can see from it why growers get confused as there are three different conversion factors which can be used when measuring in ppm's. (This can lead to nute burn if the wrong conversion is used) If you use EC or CF as a measurement there is no confusion.

 

After many hours of reading and trying to understand PPM's, I've also decided that EC is the way to go.


I would like to say thanks for explaining your method so clearly, for my stuffed up brain.


The chart you posted is the EXACT same one on my meter and they put the PPM .7 on the EC side of the chart and the PPM .5 is on the CF side. Thats why I was so confused about the PPM's. When actually both PPM's are determined by either EC x .5 or EC x .7


Anyway, you already know this so I'm just blowin smoke . . . as a matter of fact that sounds good. assit:


Thanks again for the very intriguing thread. It's sure got my head working!!!

 

Holy crap! That was a huge plant! Heath I aspire to grow up to be just like you impressive. Those plantsare hugei can't stop talking about it. And in three weeks with your system you will harvest another 26 ounces it's rediculous. Congrates. How big is your veg space? What strain are yougrowing? What nutes do you use? for all the questions but my grow space has 600 watt hps and if I can achieve at least 26 ounces once. It would be a dream come true. Thanksfor posting your incredible grow I will check out you vertical grows aswell.

 

Heath one more question. Don't mean to be a bothersome noob. You mentioned the hieght in your grow space to be 6'6". How much actual height does the Wilma system take up? Aswell as the lamp and the plants them selves? I guesssimply put how does the 6'6" break down into the three segments?(system,light and plants)

 

Now that shows root mass=massive bud! Enjoy seeing your work.

 

Never cease to amaze me Brother! Goddamn! Did I ever tell you, that your my hero? Sure I have..


MAd respect! Not many out there as thorough and gifted as this man!


GFam