I have a 20 gallon quarantine setup which has been up and running for 3 months. I have a hang on the back filter, live rock, sand and a powerhead with a heater with temp controller and AI hyrda lights. Every time I dip corals then place in quarantine, they start to RTN within a few days. I'll dip in Revive or Coral RX for 5 minutes, then rinse for 5 minutes, then into quarantine. Whether they are new corals, or existing corals in my tank, they always RTN. I have tried water changes and mostly everything else. I was told that all the dip is never removed completely from the coral and that it is causing alk swings which are stressing the coral. LPS that are in quarantine are fine since they are a little hardier. Its been 3 months now and the same thing is happening. How is everyone is who is quarantining not have the same problem?