Lily Lily 1. My wife keeps three very large water gardens, and in them she has lots of lillys and lotus. She has some parasite eating the lilly leaves. It is about 2mm in size, white, and attatches to the bottome of the leaves. We do keep koi and goldfish in the pond, so we worry about toxicity to the fish for any cure.
Water lilies have very few pests.
Bt will not harm fish.