You've been very busy this weekend!

Do you have a drop-based test kit yet? I would test the fill water for base line information on TA and CA. Depending on where you live you might even be able to get a chlorine reading. Stock up on bleach or, better yet, liquid chlorine if you can find it, stabilizer (CYA), washing soda or borax, and baking soda.

You're right: lots of brushing and bleach with the pump running 24/7 until the water is clean and balanced.