doc's can be kept under control with proper use of Potassium Permanganate, but in unfamiliar hands it will kill the rest of your fish if you overdose one time or any other bevy of variables..it is dangerous...I suggest water changes every week and leave the PP out of your repetior for a little while longer...it is a very strong oxidizer and will suffocate your water column...as far as feeding , if you want a guide...i can only recommend not to feed if your water is 45-50....I do but not often....in the hot of the summer, if i am home, i feed 5-6x a day...i will see if i can find the month/temp suggested feeding schedule the pros use....good move on the qt tank.....Billy