what to do now.

Flush some distilled water through the filter (so it doesn't burn out), and turn the thing back on...everything should be okay, but watch the fish for ick due to a possible temperature shock.

You might also want to do a water change some filter like the aqua clears spit the water out which ends up leaving your tank all dirty. My filter use to do it all the time. But you should be ok Just look out for Ick like post by dawg

Well, you could put a small amount of salt in? Say a half of a tablespoon per gallon? That's about 1/4 of what's used to treat ick, I know a lot of people use some salt in their tanks as a general preventitive. If you have salt-sensitive fish (loaches, corys, etc.), you can still put some salt in there, but if you don't see any signs of ick, don't keep it in there. While they can handle salt for medicinal purposes for a time, there's no reason to stress them if they aren't sick.

On the other hand, if you have livebearers like mollies and guppies, they will appreciate the salt at that concentration (or should it be higher? I'm sure someone who does this can give you a definate number) so you can leave it in.

Also monitor your ammonia and nitrite carefully, in case any of your bio-filter suffered.

There's really not much you can do besides turn everything back on and wait. Watch the fish to see if they are acting funny. Unless you have fish that require pristine conditions (discus etc.), you'll probably be fine.

I do not believe in prophylactic treatments, so I would say not to treat for ick unless some of the symptoms begin manifesting themselves. I honestly think that everything should be fine, but I think that increased vigilance could never hurt in a situation like that.

Dont do anything just a water change. Dont add salt or meds yet. Dont want to stress the fish more for no reason. If they are healthy enough they probably wont get sick but then they might just wait. If you see any white specks like salt on them thenyou need meds.

Fish won't come down with Ich unless it's already present on one of them.

The real danger is an unattended three-year old. Next week he'll put a fork into an electric socket. That's worse than ich.

Three year olds climb. They can pull over quite large aquaria.

Thats true your three year old who was watching him/her??? Back to the fish they dont have to have it to get it they just need to be stressed alot or poor water qaulity or be Ill and they could get ick.