Just to re-emphasize what Carl said in the post above. The dichlor that you are using adds cya (stabilizer) to your water. So do the pucks that you put in your chlorinator. Your current level is 40. We typically recommend that a good cya reading is 30-50. I would say that it is ok for you to use those two products for a little longer, but with continued use, your cya level will get too high. So, keep an eye on your cya level and when it approaches 50, switch to just using bleach for your daily chlorine and for your shock.