Hmm, what the goal on the tank? Fish only? Or reef? Tap may have metals and other stuff in it that's harmful to coral.. What is the TDS of the tap water?Using tap water. Declorinated. I've test my tape water comes out 0 ammonia 0 nitrites 0 nitrate
I'd recommend looking at this kit from spectrapure: http://spectrapure.com/Aquarium-RO...ment-Filter Kit-TDS Meters-Chlorine-Test-Kit
We are water keepers, best thing is to start with pure water, then you aren't guessing what's in it or not...