Question on flushing before harvest

[Mike7878]

I am planning on harvesting 3 Bruce Banners and I flushed heavily 2 nights ago with a end run off of 678 - 700 PPM on all three.
Here is my question.
I flushed again last night with 1.50 Liters each and the TDS was back up to 1,400 PPM.
Why?
Any input would be greatly appreciated
Mike

[Herbitual]

How big are the pots you're growing in?

1.5L sounds like a normal water to me.

[Shreder]

Runoff higher than feed, meaning you did not flush properly.

Ongoing diary >>> OGKZ / Gelat.OG / GZ / LSD (Coco, 750w lm301b)

[SyRaX]

I would give them a minimum of 3x the potsize of water. So if it’s 10L pot you’ll flush 30L

[Mike7878]

Thanks for the replies, I have them in 5 gallon pots and flushed each with 15 gallons of H2O until run off was around 700 PPM. This was 2 nights ago and last night I wanted to double check my PPM. That's when I recorded the high count.

[Mike7878]

I also sprayed the leaves and buds with 1/4 Ltr. of H2O2 to 3/4 H20 before I checked the run off PPM. I started to see white powder Mildew.
Could that have something to do with it?

[SyRaX]

I also sprayed the leaves and buds with 1/4 Ltr. of H2O2 to 3/4 H20 before I checked the run off PPM. I started to see white powder Mildew.
Could that have something to do with it?

Can I just ask why you did that?

Your plants don’t uptake water through their leaves in flower. They only like moist air in vegative growth.
The roots uptake all moisture/nutrients that they need.

Extra moisture in the air, on the buds, or leaves will create mould spores

[Mike7878]

I had white powder mold growing. Since they are in late flower I did not want to put any chemicals on them.
The plants were placed into a room with many air movers and humidity set to 20% to ensure no moisture from the treatment would effect the buds

[SyRaX]

I had white powder mold growing. Since they are in late flower I did not want to put any chemicals on them.
The plants were placed into a room with many air movers and humidity set to 20% to ensure no moisture from the treatment would effect the buds

Ahh okay, white powder will grow if your humidity is extremely high for long periods of time. I'd be checking for bud rot if I was you mate.

[Mike7878]

10-4, buds are extremely tight and there are no obvious signs of bud rot.
I was wondering why the TDS was so high the 2nd time checking the run off after the night before it was at 700