Hi there everyone I'm hoping someone here can help......! I've done 3 indoor grows in total so far, all soil, all successful although i have a problem with heat and still managed to produce 4-6oZ per in the past.. other than heat, I've had really bad ph and nute control problems as well, so decided to go hydro and bought a new alien 16 dwc xl system. I took ages to choose and research the system and was ideal for my purpose. My setup up is this: 2.4m x 2.4m x 2m tent 16 pot alien dwc xl 35l 2 x 600w hps 4 x 300w cob led 500 ltr hailea water chiller 100 gall R/O with 300ltr res Air con room outside tent 2 x 8" Airforce inline fans with Rhino pro filters Smscom 4L grow room controller Grown from clones everything was going absolutely great, Man these babies seemed to grow too quick and when I flipped after 3 weeks veg they were 28-33" tall ( although a bit too leggy). I maintained everything by the book, water temps around 19 deg, ph was kept between 5.7-6.0 I started with EC of .6 and roughly allowed EC to increase .2 per week. I did have a bit of a hermie scare as a couple of the 16 had some calyxes that looked a bit male seed like ( I found out that my LED's hadn't completely switched off during the 12 hr darkness and were roughly emitting approx 800-1200 lumen in the "off" period for 2 weeks!) I corrected this and everything started to seem ok until I started to get what looked like mag and sulphur deficiencies. My EC was around 1.6 and was due a res change so did a full drain down, which took about an hour, which I did whilst lights out so the need for water was less. (This might have been my biggest mistake??). My RO RES is kept in a room that bought the water temp up to 27 deg, so as well as adding the required nutes and supplements I added 200ml of food grade hydrogen peroxide 12vol because the chiller would take around 8-10 hours to bring temps down to 18-19deg. When I went into the tent when the lights Came on in the morning all of the plants had collapsed everywhere... A big fucking tangled limp mess. I checked everything EC 1.6 , ph had gone up to 6.3 and temp was 18deg. Leaves were showing nute burn on some plants and deficiencies on others so I did my best to prop/tie/stake all the plants and leave nature take its course for a while. 4 days later 8 are perky again, 3 are completely dead, and the last 5 are still limp with massive purple stems and every conceivable looking leaf I've ever seen on the web. I've cut down the 3 dead planes and taken the root balls out of the system buckets...all seamed healthy, nice and white, no root rot, no bad smells, no infestations of any kind, lovely hairs on most. All just shit bad luck I guess, and I got a bit too cocky thinking it was going well and it was easy, what I really need to know is what I potentially did wrong and make sure it doesn't happen again Here's hoping someone can help I haven't got any photos, I basically freaked and didn't even think to take any at the time ( and the LED's make it really had to get a decent photo) Ineed
I'm not sure but the only thing that seems different from what you were doing before is the hydrogen peroxide. Perhaps you gave them too much? What exactly does that come out to in ml per gallon?
In the future if this should happen, I would dump the soup and flush the system before refilling with fresh nutrients. If you are running a chiller, you usually don't need to add any hydrogen peroxide.
And what percent of h2o2 did you use? I'll have to look around again to find it but I'm almost positive that's too much
Just an update another 3 have died/dying in the last day but the others seem to be flourishising!!???
Jolly I only used peroxide because or the res temp was very high. I only keep it for the flush after but had heard its standard fare if you don't chill Ineed
Other than the H2O2, which nutes, and how you mix them, makes a difference that can cause lock out. Also, cannabis tends to be a magnesium whore. It shows up as purple stems. I add ~ 100 extra ppm before mixing in the rest of the nutes. This would also be the best time to add H2O2 hth
Hi I've been using hesi hydro products. I used them all to good effect in soil so figured why change. I add them directly to the res, with nutes first and then boosters. Admittedly I added them all within a short space of time (5-10 minutes between) waiting for the ph and EC meter to level out but started with the H2O2 :-/
H202 is a temporary fix. Best way to prevent problems is extra oxygen in the res. but u have a chiller so it shouldn't be an issue. Are they all the same strain? Dead and alive ones?
Hi yes I agree. H2o2 was a temp fix until my chiller could run temps down from 30+ deg to 18which in my 300ltr system takes about 12hrs.....longer on hot days with the lights on. Yes the dead ones were all one strain so I guess they were a bit more susceptible. I did another water change today and the water that came out was full of dead root material so I guess I must have torched them pretty well. I now suspect I was on the borderline of nute burn before the last change that gave me the trouble and the h2o2 just sent the weaker strain over the edge
Just cut today so place is looking a state, give it a week for me to get back in order then I'll do it. I've also just added CO2 as well
In the future, freeze water bottles, and bring down the temp of your change out or RO res prior to changing out. Drastic changes will shock the plants. Save the h2o2 for problems that actually exist.