wow the sponges were good dude... slow down... your all ready freaking out..
I think the best thing to do would be to replace the rock with real Reef Rock.
cylce the tank correctly, and start over... return the fish or set them in a stable tank at a friends house....
do you have equipment... Refractometer. RODI, test kits... anything...
also its a really really really and i MEAN REALLY bad idea to have windex anywhere around a tank... Im crazy with that even being sprayed in the same room...
maybe you will make it by with out death... (and i hope so) but.. your tank is young and you need to remember that, its gonna be some time b4 things really become stable and able,
slow....... remember slow...
if you think your going to slow... that means your going to fast, and you need to go slower then your thinking slow is.