"Kay wrote in message
have a 450 litre filtered pond in its first year. underneath each lily
leaf
are numerous clear jellylike cylinders 3-4 cm long which are obviously
new
life of some kind. the pond otherwise contains iris, oxygenators, 2
goldfisha nd 2 shebunkins. Any ideas what creature lays such a thing-want
to
keep them if not harmful but whatever it is eats the lily leaves!
thanks

Probably water snail eggs. You need the snails to deal with detritus in
the pond, and they won't cause major damage to the lilies.



Water Snails in a pond have the same effect as normal snails in your border,
they do no good whatsoever. They will eat the higher order plants in
preference to anything else and produce lots of detritious themselves, they
certainly don't eat it!
Also a carrier of liver flukes during part of their life cycle.

One saving grace is that fish will eat them when small, and big fish will
crunch even large specimens. (You can actually hear it crunch from
underwater, lovely sound, and then all the bits of shell get blown out the
gills)

--
Bob

www.pooleygreengrowers.org.uk/ about an Allotment site in
Runnymede fighting for it's existence.