My pond is 1 meter deep, and I want to plant some lilies in it. There are no fish and it is sunny. It is fibreglass lined. Can anyone think of a way to raise them up, without needing me to actually get into the pond?!!!! The makeshift temporary pedestal will need to be a couple of feet high I think. I've tried to submerge a plastic container, but I can't get it to sink. Terracotta pots will be too expensive if they're large, and stacking many smaller ones will be very heavy and hence not easy to submerge.