Vinegar and time. You would not want fish in your pond until plants had
been in it for a bit anyway. The soap is alkaline (use to be made of lye) -
vinegar is an acid. I would take about the same amount of vinegar as what
had been used of soap, add to some water and a new big sponge to wipe the
entire interior down with. When it is 'squeaky' clean then rinse with plain
water. Fill and add plants but not fish until it has sat for a week and
testing gives you a good Ph reading. Then get some feeder fish and wait
until the survivors look happy and healthy (a couple of weeks). With feeder
fish you can easily loose 50% under good conditions so don't be shocked when
you have floaters. This is advice coming from a plant person and not a fish
person. I am going to get flamed for it and if your goal is to raise fish
you should listen to the flames.

"mark Bannister" wrote in message
...
She thought she was doing a good thing, and fortunately there are no
fish yet. The pond was supposed to be up and running last year, but I
just now got the tile finished. It's a small formal pond, about 700
gallons, tiled with granite. My daughter used half a bottle of
dishwashing soap to clean it. Now it's a great big bubble bath.
I've rinsed and rinsed and still have a bubble bath. Will sunlight
eventually break down the soap?

Mark B.