Hey guys and girls. Maybe you can help me. I was asked this question by a co-worker and I couldn't give him an answer.He obviously knows I have a reef tank and his brother inlaw who does also wants to know if he can top off with distilled water till his new membrane arrives in a couple of days. I offered to give him a couple of gallons of my ro/di water but he lives upstate so it's not worth the drive for him.



