It can take several days for it to completely clear, depending on how bad it was to begin with.

If the DE blows back into the pool, I would stop adding it, because it's all going to end up back in your pool water or on the pool floor to be vacuumed, and will defeat the purpose of adding it. If it does not come back into the pool, give it about 30 minutes and recheck your pressure, and add more a little at a time until the pressure rises 1 psi. Note: I'm told this doesn't happen immediately, so give it 20-30 minutes in between doses.

If the DE comes out, then we'll tackle that then....

Janet