[wiswind]

Well.....hind sight is 20/20, best thing would have been to cover the intake with some plastic....to keep the water out until you could re-assemble it.
Next.....dry ALL the water out of the intake before cranking the motor.
If not certain that all the water is out......removal of the spark plugs and cranking is recommended......this is to get all the water out of the cylinders.

I hate to say it.....but you DO need to change your motor oil ASAP as you most likely got some water into the crankcase.
If you must start the motor before changing the oil......I would drain a few quarts out of the pan by removing the drain plug......and re-installing it.
This way, if you got a lot of water in......it will have settled to the bottom, as oil floats on water.....so draining a few quarts from the lowest point will get most of it.....although some will be trapped in pockets here and there...
You don't want the oil pump to draw water up the pickup tube......as it will cause you to have no lubrication.

The drain out of a couple of quarts (replacing with a fresh couple of quarts) would ONLY be to see if the motor starts.....you should STILL do a oil change.

As far as sealing the aquarium......I am sure that you know.....use different Sealant for the aquarium (aquarium sealant) than for the windstar (sensor safe).