I just purchased an Aquatic Life Twist-In 100 GPD 4-Stage RO/DI System
for my 20-gallon tank. I didn't use the RO
water in the tank because it has ammonia in it. Instead, I used spring water from the store, but I was told that it won't sustain a reef tank for more than a few years. I want to use the RO
water from the system that I bought, but how do I get rid of the ammonia in it? Do I add some type of extra filter stage to my system?