Please help. Ive been flushing my soil for hours and the PH is higher now than when I started!!!
I noticed a slight manganese deficiency, and its because my PH was slightly out of range. My run off was 6.9
So, ive been flushing for about over an hour now, and my run off PH is now 7.30!
Somone please help correct this.
What is the ph of your water you use to flush?
What are you using to adjust the ph of your water?
What soil are you using?
How long have the plants been in the soil?
Did you amend the soil with anything?
What nutrients are you using?
Are you sure your ph pen is calibrated?
This is what I was going to mention. I just dealt with it last week, my pen slowly shifted up by about 2.5 points.
Ive been PH the water to 6.6 with after adding cannaflush.
Then to 6.6 with straight water just PH down added cause normal tap is about 7.3 anyway
Its a living soil
About 2-3 months it was flipped to flower about 10 days ago
No, just silica, calmag, take root, and multitotal
Dutch pro, but ive not been using A+B because its a living soil so havent had the need, but its needed calmag because there wasnt enough for lighting intensity.
Yeh its calibrated. Ive been testing the water 3 times before adding flushing it through, and it comes within 0.1 each time.
But soon as I test the run off. It jumps to 7.3
I’m going to phone a friend and call @Budbrother in… I was under the impression you shouldn’t flush living soil but I’m not there yet.
If thats the case. It might explain why my run off comes out the same PH as my tap water, and possibly just ignore the run off for now. Just add back in the correct PPM of calmag? And see what happens
She was all perky when I started. Just some browning and yellowing starting which I caught early. Now shes sad 
The flush defo worked because PPM is at 352.
Leaves will always look sad and droopy after a flush.
I don’t believe flushing would be a good idea with living soil. Your TDS measurement indicates all of the salts are flushed out. Likely going to need to supplement from this point forward.
In future you would probably be better served to amend the soil by top-dressing dolomitic lime or oyster flour to adjust the PH.
I was going to switch soil next grow anyway.
Ive had some issues with living soil. Namely calmag issues.
I think with a different soil maybe even coco I can control my nutrients better.
Thanks everyone.
No, you shouldnt flush living soil. It can be fixed, but itll add a few weeks to your harvest. Maybe even a month. More than likely youve had mag issues which can be fixed very easily with epsom salts. I had issues with this angry heifer in the beginning of flower, but a tablespoon of epsom (agricultural) and a week later and look at her now 
Small mistakes growmie, all been there. She’ll get over it in time 
NO FLUSH!!! A living soil will regulate ph anywhere from 5-8.5 easy. The key to it is soil life not runoff ppm or any testing synthetic users do. Now that you flushed the soil life will need a hard restart. That is where to go now. If dont want living soil just go synthetic and ph before feeding. If like water only rebuild the life. Give it some molasses also during rebuild. It will happen fast. Go back to your top dress ammendments next week. Next time just feed the soil. Test ph average 1 time. If anywhere in range I mentioned the life will take care of it. Here is top dressed living soil grow in 3 stages. My reservoir is 8.5. When it rains its 10. I adjust ph then. Otherwise I just water straight from tap.
I always have to add mag. Top dressed epsom works fine. My tap has mucho calcium so no need cal mag. If need calmag I suggest foliar application. If just mag top dress epsom. Just what has worked for me over the years. If setup up and maintained properly a living soil is easiest soil grow I have done.
Here is an excellent top dress for living soil. Just add life.
You can flush normal living soil a couple of weeks before harvest but if you need to do it before then, you only pour a couple of 20 litre (5 gallon) buckets of water over it. If you add too much water for too long, you can drown the plant.
If you are concerned about over-watering, increase the light and add more wind to help dry things out a bit.
Normally if you flush the pH will go up if you use tap water that has a high pH. Most tap water does have a pH above 7.0 and quite often it’s closer to 8.0.
If you do a flush while the plant is growing, you want to add some liquid fertilizer straight after flushing to replace what you washed out. You don’t do this if you are flushing 2 weeks before harvest though, that just gets a flush and left (assuming you even want to flush before harvest).
Flushing is more to remove a build up of artificial nutrients caused by over-fertilizing and not having enough fertilizer water washing through the growing medium. It doesn’t normally need to be done to living soil if you aren’t using artificial fertilizer.
Thank you, she has already bounced back from this
To this
But I am wondering why I am getting browning which looks like manganese deficiency rather than calcium.
Ill upload a photo when I get home.
But last night. I added a full does of calmag after I stopped, and a small dose of A+B (1ml to 5 litres of Ph 6.6 water) of each just help nutrients until I could get some more help
It looks a lot better in the second picture
