Some great ideas here - thank you all very much! double
planting basket concept sounds good

My son makes these for me:
http://users.owt.com/jjspond/koipond/photos/set1/09.jpg

He uses a product called Marine Goop around the openings where the wires
and tubing come out so the openings are form fitted, once dry it is
apparently non-toxic as we use it on things for both the ponds and
aquariums. ~ jan

~Power to the Porg, Flow On!~