i'm liable to use any of these three at some time. i actually dd use both weed killer and bug spray at times last summer, but i tried to be careful of where i sprayed. at some point i guess i'll need to spray the deck with some treatment, and as it crosses the pond in one place it would be hard not to get it in the water. so anyway, are there any recommended brands of any of the three? something natural or home brewed? i still just have comets, that have seemed pretty hardy so far, but i figured i'd better ask if there's something considered to be fish safe.