Alright I need help. Starting a new location and I'm tired of chasing my tail. New to reverse osmosis. Sooo I am running ebb flood and drain. I use 60%RO/40%WELL WATER. this puts my water at around 130ppms. Water is tested to be clean just hard at 250ppm. Running house and garden line. With 1000w open DE BULBS. Water temps are 68-72 room temps are 78-84light/65-70dark. Neutral pressure, co2 burner 1300-1600. On paper it sounds right. But I'm still showing deficiencies. Slightly darker green on new grown with the margins showing a nitrogen or patasium deficiency and the middle leaves are showing a possible phosphorus or calmag deficiency. Or could it be light burn? Any help is welcomed thank you
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Deficiency help please
- Thread starter DrPEP349
- Start date
Douglas.Curtis
Autistic Diplomat in Training
I personally use straight R/O, for several reasons. Number one, it allows the growing of the smoothest burning, cool smoke cannabis. Two, it makes ppm/pH changes rock solid predictable. Last but not least, it allows you to put exactly what the plant needs into it and no more.
There's actually no such thing as a calmag deficiency. Magnesium is the number one variable element for cannabis, easily amended with Epsom Salts. The sulfur is also good for terpene production. Most nutrient mixes growers use have plenty of nitrates, and calcium, even with r/o water. No need for calcium nitrate.
1300-1600ppm might be a bit strong.
I've always used a modified form of the Lucas mix, one way or the other, so I've actually only dealt with mag deficiencies in the past. Perhaps someone who's used a lot of the other popular mixes can chime in here.
There's actually no such thing as a calmag deficiency. Magnesium is the number one variable element for cannabis, easily amended with Epsom Salts. The sulfur is also good for terpene production. Most nutrient mixes growers use have plenty of nitrates, and calcium, even with r/o water. No need for calcium nitrate.
1300-1600ppm might be a bit strong.
I've always used a modified form of the Lucas mix, one way or the other, so I've actually only dealt with mag deficiencies in the past. Perhaps someone who's used a lot of the other popular mixes can chime in here.
RockinRobot
Active member
Most likely culprit is Ph..
Douglas.Curtis
Autistic Diplomat in Training
Indeed. Your res should slowly vary between 5.8 and 6.1, depending on the strain and setup. The pH drops a bit between floods and you want it hitting 5.4 in the root zone every 7-10 days.
Excellent info D.C.
That's one I haven't ever seen before.
I saw no mention thereof so would suspect pH issues as well.
Following that... You need to get your well water tested for mineral content so you can build your soil around your water source.
That's one I haven't ever seen before.
I saw no mention thereof so would suspect pH issues as well.
Following that... You need to get your well water tested for mineral content so you can build your soil around your water source.
