I haven't used the Red Slime remover but the other stuff for the same job - Chemi Clean, I think.
Basically the instructions for how long to leave the skimmer off for this stuff are very conservative. These skimmers react to the slightest change in water chemistry and using stuff like this makes a big change. My Berlin Turbo goes crazy even if I change carbon or RowaPhos.
Give it time, try turning it on in another 24 hours but expect to empty the cup a few time relatively quickly until it settles down.