I have a small water garden, maybe a foot and a half by a foot and a
half, with a few plants, a fish and a snail. The leaves on the the
plants are turning yellow and dying. I don't know why. My books suggest
nitrogen deficiency but they aren't specifically about water plants. If
I fertilize with a nitrogen fertilizer, will my fish and snail still be
ok? Anyone else experience this?

thanks,
annie