Total PPMs(EC) and Microbe additives?

[Cerebral Goo]

In researching microbial additives and as listed on some manufacturer's instructions (Recharge etc), it seems as though they are best given in plain water without fertilizers. It seems quite a few people add them with their feedings. Since the additives raise the PPM, should the PPM of the microbial additive be included with the fertilizer for a total number of PPM/EC? Or should the fertilizer be mixed for the listed target number of PPM/ EC and the extra raise in PPM from the microbial additive is inconsequential?

Thanks! Mahalo! Gracias! Merci! Grazie! Obrigado! Danke! Arigato!

 

[Mañ'O'Green]

Follow the manufacturers instructions.

 

[CannabisMingus]

Since the additives raise the PPM,

I dose Great White (and have Hydroguard in the past) have not observed this. If it exists, it's w/i the margin of error of my pH meter in any event. How much ppm increase did you observe?

 

[Cerebral Goo]

Follow the manufacturers instructions.

As always, thank you kind sir!

 

[Cerebral Goo]

I dose Great White (and have Hydroguard in the past) have not observed this. If it exists, it's w/i the margin of error of my pH meter in any event. How much ppm increase did you observe?

Have noticed it with Recharge and less with Tribus. About 100 PPM a tsp per gallon with Recharge. Being a newb, I've never really dealt with anything related to PPM/EC in general or meters, so I could be botching something or my meter could be screwball Just got the meter a couple weeks ago and have two point calibrated it twice. I have a cheaper Apera EC 20 which will show PPm and then randomly switch to EC. Haven't figured out how to change it from one to the other and there's not much of a manual for it. It said on their website that it was a 700 scale. Which is another confusing thing to new peoples. 500 scale, 700 scale, Euro, US, EC.....Like 'Standard" vs metric....just pick one already!!!

You mentioned PH and that definitely increases with Recharge. On their website they state this and said to not try and correct it . The ph will decrease as the microbes get active in the medium and go back down.

 

[CannabisMingus]

About 100 PPM a tsp per gallon with Recharge.

Interesting. I wonder if its caused by the sugars - which would break down quickly regardless of medium.

Sorry - meant EC not pH. My bad.

 

[Cerebral Goo]

Interesting. I wonder if its caused by the sugars - which would break down quickly regardless of medium.

Sorry - meant EC not pH. My bad.

All good! thank you for the replies!

 

[Mañ'O'Green]

FYI EC is the actual measurement but different meters covert it to different scales. This is a conversion chart.

 

[Cerebral Goo]

FYI EC is the actual measurement but different meters covert it to different scales. This is a conversion chart.

View attachment 1358644

Took me awhile, but think I figured out a the whole different scale/instrument reading thing a couple weeks ago. That's what my "standard" vs metric measurement systems comment was about. Too many different scales, so why not just go with EC? Which, from what I have gathered, seems to be the most accurate figure and applicable to all the different scales. The Apera ec meter that I have is apparently based on the Truncheon scale which I believe is the 700 scale. But you already know all this....

While I sort of have your attention, what reflector(s) do you use with your Agromax Pure UV bulb? HTG has high output T5 fixtures. Would those work or is there a better reflector? (sorry to curball the thread, but since I started it...)

 

[Bruce Campbell]

If you're curious, the 500 & 700 scales exist because they aren't actually measuring the ppm of things in your solution - they're measuring the EC and converting that to an equivalent ppm of only NaCl (500 scale) or only KCl (700 scale).

NaCl and KCl are the most common and basic salts used in industrial processes, and a lot of companies (i.e., potential meter customers) use a lot of them in a lot of different industrial processes. So, what started as a "convenience" feature to sell more meters eventually became standard convention.

But for us, yes - stick with EC. If you're using ppm, then remember to also check which scale your nute vendor is using after you confirm the scale that your meter uses.