Keeping fountain water fresh and safe for butterflies
I have a recirculating fountain as part of our butterfly garden. I have some large rocks in it to allow a safe place for butterflies to sit and drink. However, the water tends to get kinda slimy after a week or two. I know there are chemicals you can put in the water to prevent that from happening. But obviously I don't want to harm the butterflies either.
So I was curious is others have found a way to treat fountain water without harming the butterflies?