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You will have to take some measures to protect against root rot with those temps, I don’t think oxygen levels you need to worry about - DO is 9.1 mg/L at 20C and 7.6 mg/L at 30C. Keep in mind also whatever is used by the plant should be immediately replaced by good bubbles. Sterile approach...

It doesn't make sense that it will burn the plants but not show on the TDS meter, as others have said your meter may be off. Also that 10ml in 10L can burn sounds crazy concentrated, at least compared to what I am mixing. I normally aim for about 1.6 EC total in my DWC, never had nute burn...

Good to see things are improving. These plants can take a beating so there is almost always a way forward once you correct the problem. My understanding is H202 and chlorine(in the bleach) work the same way so you only need to use one or the other. I found that calculator in a thread on here so...

My bleach treated roots

Use plain basic bleach with the only ingredient sodium hypochlorite. Aim for about 3ppm, added every 3-5 days. I use tap water which starts with 1ppm (city water report) and add bleach to get to 3ppm. Use this calculator to work out how much bleach you need to add - for me it was 6 drops. I...

Gotta be one of the oldest threads I‘ve ever seen resurrected, congrats Keith! That said I’ve never heard of too much light (including weeks of 24/0) ever hurting a plant in veg.

Although it goes against convention I disagree with the above. Search online and you will find recommended water temps in hydro horticulture range a LOT higher than the 20C/68F that is typically suggested here. Here’s my comments on the key points: 1. Higher res temps will give faster growth...

During flower of my very first DWC grow, pH started spiking up with yellowing leaves. I battled to the end while trying to keep it under control and found bad root rot when I chopped, it was rotted in the middle of the roots so not obvious from the outside. The plant had also grown new some...

Because they are fine with it in my experience. Most of the advice on these forums is to be very conservative on nute concentration for the first two weeks. A minority say go high strength (say EC 1.4-1.6) from the get-go. I go with the latter and haven't seen any issues. That said when...

Why post twice?

Things are looking up! It looked like overwatering and I'm sure now that's what it was. I believe initially it was mainly a lack of airflow, made worse by slighty too high water temps (lower DO). Then when I was away for a week, air flow was up (but still sub-optimal) while water temps went...

I know this is an older thread but I am going to try this out and can’t quite figure the wiring. I am using the same components suggested by OP: PC power supply for 12V DC supply STC-3000 Temperature controller Water pump Pre-built thermoelectric cooling block Those last three components all...

I don't really want to start over without knowing the cause. Problem was there very early on and cause is still a mystery. Thread title may be misleading now since they have passed seedling stage. Roots look like they are healthy. Could it be: - Old/stale nutrient solution? It's a hydro store...

After coming back from some time away where they were unattended things don't look so great. Water temp got up to 77F and humidity over 80%. Water temp is 63F now (will drift up) and humidity is 75% and coming down. The nutes, air pump, air stones and the rest of the actual DWC setup I've...

Sorry not sure what you mean about cutting? I lowered the water level slightly so there was a small gap to the bottom of the net pots. The roots that were growing out (still pretty small) looked nice and white.

There’s a gap now, as well as a second fan to push fresh air into the tent. Not really seeing any change so far. I’ve had to go away so they will be unattended for a number of days, no more I can do!

Thanks, this might be it! right now I have a piss-weak exhaust fan and there is barely any airflow in there. I thought at this stage it wouldn't matter (as they wouldn't be consuming much CO2). I've now got a fan blowing on them! The pots were a bit clear but water level is much closer now...

Thanks for the reply. Been 4 days since roots poked out of the net pots and I transferred to the bucket. I was hand watering from the top with about 1 EC for 2-3 days before that.

Hi folks, would appreciate any ideas on why these are dropping and curling down so much. Thanks. DWC Ph about 6 EC was 1.4, I diluted to 1.15 today in case that is the issue. Water temp about 22C/71.5F Air temp 26C/79F RH 67% I tried lowering light intensity, no change so have increased it a...