I agree its a great source of Nitrates but what about if your treating with Meds?? Some meds are pretty potent but if they are safe with aquarium plants than they must be ok with outdoor plants
I am waiting for sunlight so I could take a picture of our garden, the outlet only waters about 50% of the garden and the diffrence is huge, the half with fishwater have much bigger leaves and is also greener in color.
What about water from a new (uncycled) tank? I wouldn't think ammonia would be too good for plants but I suppose its in cow poop and other stuff they use for fertilizers?