When they are coming from the vegetative state I keep some MaxiGrow/MaxiBloom in the reservoir and mix it 1:1. As the plants progress through flower I tend to add less MaxiGrow and more MaxiBloom. I have had this suspected cal/mag deficiencies for the past couple weeks, and the leaves now have lots of brown rust spots, and my smaller clones who are in the staggered container for a perpetual grow are beginning to get really crispy. I decided to try foilar feeding some magnesium, and that didn't work out very well. I thought it might of been a pH problem, so I did a water change two times, one with a normal 1/2 strength level of nutrients, and when the problem didn't seem to be clearing up, I did another water change with 1/4 strength nutrients to hopefully stop some of the lockout that I thought might of been going on. However the problem doesn't seem to be getting any better. I don't have pictures yet, but I will later tonight. I am kind of late in flower on one of the containers and the top colas are starting to get a lot of red hairs even though the remaining colas seem to be pretty far behind. Any help would be greatly appreciated and I will be able to get pictures up later tonight when the lights go off. Thanks!
What type of medium; soil or hydro? Hydroponics
What brand and type of soil? N/A
Indoors or outdoors? Indoors
What strain? Bagseed (It is from mexican brick, although it looks like a hybrid)
How old are the plants? In one container they are about 3 -4 months old, and in another container only about 1 1/2 months old.
What type of lights and how many watts? One 250W MH and one 400W HPS all in flowering chamber.
How far from the lights? The 250W MH is around 18 inches, and the 400W HPS is pretty close, sitting at around 10 - 12 inches in a vented hood.
What is your watering frequency and source of water? Tap water, not treated and I change the reservoir once every two to three weeks.
What, how much and when was it fed? NPK? MaxiBloom/MaxiGrow at 1/4 strength at the moment, gradually moved to 1/2 strength. MaxiGrow - 10-5-14 ; MaxiBloom - 5 - 15 - 14.
What is the medium/runoff pH and PPM if in hydro? I am using rockwool cubes, held in netpots surrounded by hydroton rocks. The pH since in hydro stays between 5.4 - 5.9, and I am unsure of the PPM.
What are the temps and humidity in the room? The temperatures are around 72 degrees Fahrenheit with the lights off and 79 degrees fahrenheit with the lights on. The humidity is around 35% to 45%.
What size pots? 3 3/4" net pots.
Any bugs? Look real close. I have inspected the underside of the leaves and the plants, but haven't found any bugs.
Any other pertinent info? Refer to top of post.