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

549
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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

197
28
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.
 
AMBITIOUS

AMBITIOUS

3
3
Exactly same issue here, it's because the grow and the bloom suck in moisture from the air so now we cant go based off weight. I'm trying to figure this out myself. . All I know is their charts that they give us are INCORRECT.
 
Anthem

Anthem

2,596
263
I have been using the Athena Proline for about 10 months and I have no had these problems. I do use their weights to achieve the desired PPM and they are usually right on the money. Also I have not had that much trouble with the grow and bloom gaining moisture. I do store my nutrients indoors in plastic tubs. Once I break the seal on the 25 pound bags I place the remainder into plastic tubes so that may help but the EC is on mark for me, using Blue Lab pens
 
Bbonez

Bbonez

161
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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.

Were the salts wet? If so perhaps some of the 25lbs of "salt" was water weight?

Have you tried different measuring cups? I've noticed the cheap shot glasses and plastic cups from grow stores are not as accurate as a syringe.

In the future, I recommend using 3lbs per gallon so you don't take up so much space.
 
DazedNconfused78

DazedNconfused78

573
93
Were the salts wet? If so perhaps some of the 25lbs of "salt" was water weight?

Have you tried different measuring cups? I've noticed the cheap shot glasses and plastic cups from grow stores are not as accurate as a syringe.

In the future, I recommend using 3lbs per gallon so you don't take up so much space.
Holy crap! You use a ton of nutes with Athena for a 50 gallon res. I use GH and i also have a 50 gallon res. For the light schedule in full bloom i might use 500mls of bloom for a full res. If im just adding water. Like 8.0 mls a gallon. Not saying your doing anything wrong. Just pointing out how much less i use. I have heard though you feed heavy with Athena. But thats what they want you to do so you buy more product. All about the $$$
 
StealthLED

StealthLED

111
43
Yeah same issue with me. I used the 10lbs tub to make the 2.5lbs/gal mix. Core is always just about spot on the ec it should be but grow is 0.5 ec under. I asked athena they told me I've mixed wrong, which I know I haven't. Looks like now I need to use almost twice the amount of grow so I'm guessing Bloom will probably be the same... I'll see how this run ends and make a decision on whether to stick with athena unless they come back with some help...
 
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