Adding 6 gallons in your pool all at one time raises the chlorine level by 35ppm!

A better plan until you get a feel for your pool's behavior, is to take 5 minutes and test every evening. Also, with a CYA of 54 (how did you get that number?), your chlorine is on the low end of acceptable. (Take a look at the Best Guess Chlorine Chart in my signature below.)

What was your actual pH (before the R-005)?