Exo
Tastes like chicken!
I don't think that you can compare rainwater which sits for weeks in a tank to rainwater in the wild which is given to the plants in its purest form. Sitting in a tank for a long while it starts going rotten. Besides the heavier EC-value bad bacterias are also getting alive. I checked the EC-values several times and always the EC-value went up dramatically after a while.
Yeah, I've noticed that it starts to smell a bit off, but I've never noticed any detrimental affects on my plants other than increased alage growth, but that onlys seems to be a real problem when I use an LFS topdressing.