Question
Our pond is approx. 500 gallons.  There are no fish in it, yet this year.  The lily pads are getting eaten up and only the veins are visible.  Something I read said it is probably snails or larvae.  Can you tell me what it is and how to get rid of it?  We haven't had this problem in 6 years.  Thank you.

Answer
It is definitely a pest with a chewing mouthpart, most likely aphids or mites.  The solution depends on exactly what it is.  You should be able to see tiny dot-like insects, perhaps red in color.  Hot sauce diluted with water typically takes care of aphids without harming most plants.