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Something is happening...let's see if it sticks. I got Great White (GW) in the mail yesterday, so mixed up a batch of nute-water to sit overnight in prep for res change today. 9pm last night: I left the res at 0.42EC and pH 6.2. Noon today: 0.475EC pH 4.6. Finished balancing nute solution...

I agree with all you said - especially the small res (live and learn). Didn't know to add cal/mag first, I was adding it after the nutes so I'll switch that up, thanks

Since Southern AG is so much more concentrated, is it basically that you cannot use too much bacillus?

Hey there - yeah, I think it's starting. I've been fighting it with bacillus (hydroguard), with not a lot of effect. Maybe holding it from getting worse, but not really clearing it. I just got some Great White today, so I'll include that with the next res change and see what happens. I had a...

So with four plants they are drinking about 1,800-2,400ml (my math is rough but say 1/2 - 2/3 gallon) every 12 hours or so. The tent makes it tough to control temps, but where I live there isn't another option. I could buy a portable A/C, but the exhaust would just be going back into the...

Right, thanks. Hydro, DWC

Hydro - DWC I'm battling issues (won't get into it in detail here), and have been forced to lower my EC/PPM to combat the issues. I'm trying to work the EC/PPM back up now that I seem to be getting a handle on it. I'm on Day 20 of Flower, and would like to hear from everyone what the lowest...

Company I bought my DWC rig from and the nute company were quick to dismiss cal/mag, but I've seen a noticeable difference in just a day. Thanks to the bright folks here for the advice!

UPDATE: People have mostly stopped replying here, but in case someone else has this issue down the road, I will keep posting my efforts and progress (or lack thereof). Same issues persist. I am doing res changes and lowering EC per the 420 Mag chart (and per my burnt tips) - I am topping off...

Sorry to hear that - definitely a frustrating issue. My grow has gone from fun and enjoyable to tedious and laborious...I'm spending 30-60 minutes at least twice a day just to keep the pH from dropping into the 3s... I hear what you're saying, but that's not what is happening to me. I don't...

I am changing the res often now to combat this issue. Here's my current approach: * Fill bucket with RO water, add nutes (Lotus Nutrients), aiming a little higher than what I want the final EC to be, and let it sit for 24 hours * Check EC and pH next day. Add RO water to bring EC down to...

Hi all, DWC with top-down feed, 8 net cups in one res (won't do that again), using 4. Having issues with pH drops and EC rises, possibly start of root rot. My grow tent is in my garage, which can get hot sometimes. I've got a bluetooth hygrometer and temps range between 72 and 84, with RH...

Hey, thanks! I found this on another thread. Someone told me this was meant for veg only (where pH tends to naturally rise), and not applicable to flower (where pH tends to naturally fall). One thing that got me are these two scenarios which, according to the chart, call for very different...

Water temp is higher than I would like. Water temp is around 65-77 degrees. I don't have the ability to add a chiller at this point, but am working on getting the rh down with a dehumi, but not sure what more I can do about the res water temp. No light getting in, other than when I remove a...

Hi, yes I agree the rh is high. I ordered a dehumidifier and am going to install it tomorrow, so hopefully that helps. My EC and pH pens are calibrated, but you're right - gotta start somewhere. At the moment I'm trying hydroguard and frequent res changes to fight the issue. Will lower RH...

RIG: DWC w/ top-down feed, 8-site res with four plants (two of each type). 3rd Week of Flower. Temps range from 72-84F with rh at 68-77%. KIND LED lights, RO water. 126GPH air pump with two stones - pump is outside my 4x4 grow tent. Right about the flip my pH suddenly started crashing. At...

Further update: Changed res yesterday morning to 0.62EC and 6.14pH. Nine hours later it was 0.675EC and pH 4.75. Added pH'd water (no nutes) to EC0.55 and pH6.0. Today at noon it was EC0.6 and pH 4.1. Added pH'd water to EC0.5 and pH 6.0. I can't for the life of me figure out why EC is...

Trouble you for a second look? Two things - 1 is a top-down shot which showcases the burnt tips. I can't for the life of me figure out why I'm frying the tips when I'm down to EC0.5 in the 3rd week of flower...does this look like over- or under-feeding to you? My thoughts were over-feeding...

Hi there, thanks for responses on some of my posts. Could I trouble you to take a look at these pics from today? I can't get inside my res b/c of the way it's set up, but the roots I can see appear to be OK. Today I jammed my phone down inside one of the empty net cups and snapped these. I...

10 hours after res change EC rose from 0.62 to 0.67; pH dropped from 6.14 to 4.75 (wtf?). They drank a lot more than usual. I'm new to this, but it's odd to me that I'm seeing over-feeding signs at a 0.6EC going into the 3rd week of flower... So I topped-up with pH'd water only (no nutes) and...