Ph and ppl rising in dwc

How big are these plants? 1ml per L is a lot depending how big they are

 

Your ppm is probably too high. Advance nutrients likes to tell you to use more than needed As to sell more nutes. It’s a very broad estimate considering all the different grow styles out there. I rarely ever get over 700ppm in full flower

Get the ppm to around 150-200 (ppm 700 scale) to start.

You can also substitute voodoo juice for botanicare hydroguard for about a third of the price and it does the same thing.

Another thing to consider with these nutrients, (and I’m only saying this because I grow with these nutrients)
don’t adjust the ph.

The nutrients in AN ph perfect are chelated to be available in a very broad ph range from something like 4-8.5. By adding acid or base, you’re undoing the chelation process, and getting nutrient lockout.

I know not adjusting the ph goes against every growers advice on this forum, and they’re very right, but with AN ph perfect SPECIFICALLY, don’t f*** with it. Leave it alone, let it work, change it every 7-10 days in flower, and enjoy the rewards.

Good luck

 

No problem. I had to stop myself from checking ph because I’d drive myself crazy when it was at 7.5 and showing absolutely 0 deficiency’s. It works I promise.

Ppm is measured in all different kinds of ways (ppm, tds, EC) depending on the meter. EC of 1.0 is 700ppm or 500tds. This chart should clear it up

 

I used mgb for a grow. Might as well get diff nutrients imo.

Dont trust pH perfect. Manage your pH.

1:1:1 the whole grow? So the same nitrogen from late veg during late flower? Yea that makes sense...?

I had so many problems with mgb. Deficiencies, toxicities, lockouts due to AN reps telling me to full dose. AN reps telling me to Ph down and up my nutrient water too.
All pH "perfect" does is allow nutrients to be taken in at a wider range. Not 4.5pH and 8.5pH, yea right. But if you're at 5.7pH, then the chelates allow calcium (optimal intake at 6pH+) to be taken in too. More so than I guess other nutrients. But other nutrients have chelates too. It's not uncommon or special.

Now down to helping you..
The ratio is 1:1:1, that's all that matters. Tailor your ppm to your desire, as long as you put the same amount of each bottle per L. Is 1mL per L too much? Then half it. Too much? Then third it, or quarter it. Whatever you do, add equal amounts of each bottle.

I would get diff nutrients and learn how to manage nutrient water than rely on anything/anyone else like pH perfect and/or AN reps. Good luck tho, many people have great pH perfect success, but that ain't me.

 

If it's all good then keep rocking until they tell you their more hungry.
A large drop in ppm will usually tell you theyre hungrier. A rise in ppm will usually tell you they're overfed.
If you ever get lockout, flush by making an extremely weak nutrient solution compared to your regular feeding with plain water(some flush with completely plain water) and letting the plants sit in that for a day or two. You might see an increase in ppm, but it's not because they're overfed, but because they're letting out the oversaturation of nutrients in their vascular system that is higher concentration than the water outside. This is what flushing accomplishes. Once the flush is done, ide recommend refilling at a lower dose and working your way up through top ups.

I'm starting to think theres no such thing as underfeeding in dwc because the nutrients are so available. I'm at 380ppm (.5) with two big plants almost in midflower. If I go to 450ppm I get slight burns.
Also believe if your oxygenation is ideal, got bennies/humates for increased uptake, and your VPD is ideal for the stage the plants are in, then you rly dont need that much nutrients.

I cant believe I've had successful grows where I was feeding 1000ppm.

 

It works off how much the plant can uptake! so if it drinks 2litres of the water and small amount of nutes! Your water nutes ratio in the bucket is going to be a more concentrate! Check you ppm before you add your nutes! You would probably want to be running 100ppm going into 200-250 in the following weeks check you ppm s if it heaps lower you know it need more nutes! I’ve heard to your not meant to ph that advance nutrients ph perfect? but don’t quote me on that

 

I forgot to mention your vpd.
Leaf temp
Humidity
Temperature
are all that affect your vapor pressure deficit(vpd). This in part determines your plant's transpiration, ie how much water and nutrient its uptaking.

Theres a lot of shit at work that I'll try avoid playing scientist with. Because of these systems involving DO at the roots and pressure through the plant, water+nutrient is pulled up thru the roots>xylem>stomatas continuously. We can assume plant matter is atleast 90% water. Most of the water the plant uses is just to release it into the air! It's a crazy read. It's all online.

Anyways, here is where it gets more complex lol,
Theres air vpd and leaf vpd. Leaf vpd is what were all looking for I think. I'm not sure how air vpd ties in with it all, still learning! Even wind affects transpiration!

Ideal (leaf)vpd for cannabis throughout its life can be in the wide range of 0.3kPa to 1.5kPa. The lower the number, basically the lower the transpiration.Theres calculators online.
I attached a thing I've had since I started here, someone gave to me.

Now how this is all relevant with nutrients and ppm is as your transpiration ramps up, the systems are being used with more effort, so more water, more nutrient, more uptake. With your temps your vpd (assuming leaf temp is 76f) is 1.19kPa. High for a 2 week old.
So far I've only noticed personally that inappropriately high vpd increases risk of burns and might put undue stress on a young plant that might express it in a number of odd ways. I've had a plant's leaves in early veg look a little funky shaped/textured, then raised the humidity, and bam, the leaves looked healthier the next day.

With great vpd, comes great responsibility. Lol.
Recently I raised my vpd from 0.9kpa to 1.1ish and I noticed I could lower my ppm to achieve similar eating patterns when I had a higher ppm during lower vpd. Only really recognized it in action in my current grow.

Sorry for rambling, but thanks for letting me ramble. They say you learn the most when you teach. Any pros out there correct me if I'm wrong, I need ta learn too!