Drought stricken pond
My little wildlife pond, about a square metre surface and 13 inches deep when it's full, has lost almost half its water. I've taken out the little solar fountain to reduce evaporation. It's full of Canadian pondweed aka Elodea, there are two water lilies and no vertebrates. I'm saving my precious store of rainwater for the garden, and I haven't much left of that. The pond gets about eight hours of sun and the water gets quite warm. I'm wondering whether to top it up with mains water. I suppose that would be less harmful than leaving it to dry up any more. What's everyone else doing?