Hi ILGM fam
I am around day 45 of flowering on a Critical Punch auto. I’m growing indoors, hydro (RDWC) with hydraton as a medium. Only nutes I’m using are Advance Nutrients base trio, plus “Big Bud” and “Bud Candy” added as-per recommended schedule.
This is my first hydro grow and overall it’s gone exceptionally well, I’d say! However about 10 days ago, I noticed some burnt looking tips and checked PPM which read a whopping 2300!! I hadn’t done a single drain/fill since beginning the grow and didn’t seem to notice any problems until this situation.
I did a drain/fill on 5/29 with a new solution prepared in another tote, measuring at 1100 PPM and 5.8PH. After draining my system and filling from the prepared reservoir, I’m seeing about 1300PPM consistently. I’m guessing the higher reading is a consequence of some of the original solution remaining in there as my draining method cannot drain the system 100%
I’ve been checking PPM and PH every day since 5/29 and I’m consistently seeing ~1300PPM and ~5.8PH. I’m adding about 3L of plain PH water every 36 hours or so. As I understand it, the PPM staying consistent whilst water level dropping is telling me that the plant is taking up nutrients and water at the same rate (which is good), though I’m very much eager to learn more about this area of hydro, so any input is very welcome.
Over the past 7 days, we’ve had hot outside temps here and I don’t run an AC in the room, though do keep shades in the house closed. The tent has averaged 73.5F and RH has averaged 53%, which I’d like to get down under 50% so I ordered a larger dehumidifier. As I don’t have a chiller in this system, I’ve been adding frozen water bottles to keep the water temps in check, which has successfully kept them between 70-75F
Alright, I hope that is enough backstory to help diagnose what I’m seeing here! To repeat myself, the burnt tips appeared prior to the flush (and were the reason for flushing in the first place)
This leaf caught my eye and is the most concerning to me. What is going on here?
A few others I noticed look like they may be on the same trajectory, but I’m not sure…
Any advice would be very much appreciated! I did try to research this myself and my diagnosis is a calcium or magnesium deficiency, so I did go ahead an order some CalMag but wanted to hear other’s opinions before I go about introducing anything new to my plant this far along. Thank you ILGM community!!