Athena Pro line help with EC issue

  • Thread starter Makaz
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Makaz

Makaz

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Hi,

I recently switched from GH to Athena Pro line and have a question about target EC. My target EC is 2.0 in Veg and 2.7 in Flower (following the heavy feed chart). I converted the powder nutrients to liquid using 25lbs of nutrients to 25 gallons of water. I was very very careful with this step. I measured the water very precisely , used a aquarium heater to increase water temp to 90 degrees and used a aeromixer to mix everything.

I'm following the Athena guide to using Pro line as a liquid nutrient and for a 2.7 EC you need 33.3ml of Core and 55.9ml of Bloom. The individual EC chart states that for a 2.7 EC target, the Core should put you at 1.08 EC and the Bloom adds another 1.62 which is the 2.7 EC.
Now here's my issue, when i add the Core the EC is 1.10 which is on target but when i add the Bloom its only reaching 2.3 EC. So the Bloom is only increasing the EC by 1.20 EC and NOT the 1.62 like it should.

To get the EC to 2.7 I am adding approx. 50% more Bloom! For my 50 gallon res I should be using 2,795ml of Bloom but im having to add another 1350ml of Bloom to get to my target of 2.7 EC.

The Athena support rep i spoke with said its possible I had more than 25 gallons of water in tank i used to convert the nutrient from salt to liquid which I don't think is true since i filled the tank myself and was very careful to get it exact but assuming I was off by a few gallons, that shouldn't equal a 50% increase in nutrients needed.
Note: I used 3 Blue Guardian PPM/PH meters to confirm the PPM when testing the above.
My questions are,
  1. Can a few gallons really throw off the concentration by 50%?
  2. According to the Athena rep, as long as I hit my target EC's I will be fine from the standpoint that my plants are getting the correct EC with the correct rations of nutrients. Is this true?
  3. Has anyone else had a similar issue using Athena?
Thanks!!
 
Dub_City405

Dub_City405

1. Not by that much.
2. Yes. Pay attention to the plant and adjust accordingly to what the plant tells you she wants.
3. No. I just liquid. But im switching to powder soon. Glad to know information.
 
Makaz

Makaz

7
3
1. Not by that much.
2. Yes. Pay attention to the plant and adjust accordingly to what the plant tells you she wants.
3. No. I just liquid. But im switching to powder soon. Glad to know information.

ok thanks. That’s what worries me. Can that mean there is something wrong with the batch I bought?

Per Athena I should add 2100 ml of Grow for 2.0 EC but I’m having to add 2900 ml.

I don’t mind adding more nutrients I’m worried there are other issues with this batch of nutrients.
 
pork

pork

I've had the same problem. I haven't mixed a whole 25lb bag into 25 gal, but I've done 1 gal and 2 gal mixes with 2lbs/gal and 2.5lbs/gal, and each time I've mixed, I've been sure to get it all into solution, however my needed ml/gal is not what the athena chart calls for. this ends up taking a good deal longer to get each component EC to what its supposed to be, rather than just dumping pitchers into my res. One thing I've noticed is that I've gotten a couple bags of athena that are bone dry powders. the last bag I got was clumpy and wet. this could have contributed to me weighing a wet weight vs a dry weight. but i don't really have a dehydrator to dry this wet ass batch of athena out.
 
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