Laughing Buddha Barney's

Just did a full reservoir change. I have been just topping off with nutrient and plan tap water. (This will be my only water change until time to flush) I have switched from liquid koolbloom over to powder koolbloom for a week or 2 before I flush. Everything looks good ph in check and ppm. Still using frozen bottles keep water temp check.. might start using 2 liters instead of water bottles