Well I like the idea of maybe using a de-ionizing system on the residual water....maybe some sort of filtration to pull any silver, but otherwise it sounds like the dilution and chemistry involved should be OK for my cottonwood and other shrubbery.

Sorry for stirring up such a bee's nest! I don't like polluting nor being wasteful either, so sometimes analog photography has it's hypocrisies built in.

...now time to pour that dichromate solution on my neighbors tomato plants...