hmmm ok cool.

So I've started to flush the soil out. I'm doing this by, as you said, watering the soil with 3x the normal amount of water, then presumably empty the run-off water to prevent nutrients being absorbed back into the soil.

Should I do this once a day yeah?

And how long should I do this for?

Also, as suggested before, that I have over-watered the plants. By flushing them now do I run the risk of drowning the plants?

Thanks for all this help, I really appreciate it!