Need help running Heavy 16. Not looking great.

[rosinhood666]

Hey dudes any advice on what is going on here? I'm running heavy 16 following their chart. Running canna coco with ro water. I was thinking magnesium def... Not sure tho. Running heavy 16 full line. I don't have epsom salt so I gave them some Magical at 5/ml a gallon tonight to see if I can get any improvement. Thanks dudes!

 

[rosinhood666]

PH 5.8 going in. EC 2.0.

 

[f-e]

What is the runoff ?
How much Epsom should you be using. It supplies Mg and Sulphur. Maybe 7 times more Mg than the same amount of some calmag I can't see the label for. The Calcium component in calmag antagonises Mg which is why Mg is put in boosters really aimed at adding calcium. Using some a calcium booster for it's mag could be ineffective.

At a glance, yes, Mg. However more seems to be going on.

 

[rosinhood666]

Run off last watering was 1500 ppm 500 scale. I let them dry out too much. When i watered earlier I ran enough water through to bring the EC back down to 2.0 or 1040 ppm 500 scale. I will be watering more frequently now so the ppm doesn't fluctuate as much. I try to not let the run off be higher than 50 ppm than whats going in. I have herd that the standard rate for epsom salt is 1 gram per gallon. Should I skip the calmag and epsom and just up the heavy 16 base nutes? Thanks!

 

[jackspratt61]

Hey dudes any advice on what is going on here? I'm running heavy 16 following their chart. Running canna coco with ro water. I was thinking magnesium def... Not sure tho. Running heavy 16 full line. I don't have epsom salt so I gave them some Magical at 5/ml a gallon tonight to see if I can get any improvement. Thanks dudes!

That's P..do you have MAP?

 

[rosinhood666]

What is P? And what is MAP? Sorry pretty new to this stuff.

 

[TanzanianMagic]

Run off last watering was 1500 ppm 500 scale. I let them dry out too much. When i watered earlier I ran enough water through to bring the EC back down to 2.0 or 1040 ppm 500 scale. I will be watering more frequently now so the ppm doesn't fluctuate as much. I try to not let the run off be higher than 50 ppm than whats going in. I have herd that the standard rate for epsom salt is 1 gram per gallon. Should I skip the calmag and epsom and just up the heavy 16 base nutes? Thanks!

1. You're massively overfeeding. Try an EC of 0.6 or 300 PPM of flowering food for a couple of feedings. When the runoff EC/PPM reduces, slowly bring EC back up to 1.0, maybe 1.2, eventually.

2. You do need epsom salt (MgSO4) at 0.1 EC.

Especially with 1) R/O water which takes magnesium and calcium out of the water and 2) when the first pre-flowers show up, the plants need magnesium.

Feeding at a maximum of 2.0 EC is for late flowering, when the plant is producing a lot of bud.

Remember that nutrient wise it does less damage to the roots if you go from too little to more, than from too much to less.