yes WH/WL can be aggressive growers, but if you have koi they'll eat the roots
off, goldfish do too but not as much as koi. I put them in the top of my
biofilter and rotate them with the ones in the pond to give the roots a chance
to regrow. When they start overtaking, I remove some of the older larger ones
to the compost heap.
Karen

In article , "John Burton"
writes:


Any other "tricks" other than plopping in water hyacinth or water lettuce.
I hear that both are so agressive that they tend to "take over" the top of
the falls or where ever they're planted.

One suggestion I heard (and would like a bit of feedback) is to put them in
a PVC "square". That is, build a ring around the rosie ...



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