RO Water vs Tap Water (Edmonton)

[SpruceGruve]

Originally Posted by Bryan

Wouldn't even consider it in a reef tank, trace elements like copper from your house pipes will slowly build up in the tank and eventually absorbed in the live rock poisoning your invertebrates etc..

My local water (GVRD) is around 12-15 ppm and I use strictly DI

this makes complete sense.

also i live by edmonton.
im not a salt guy,im a freshwater guy, and even with freshwater i need to use RO water to get certain fish to spawn.
not to mention you live in edmonton, your water is 7.8 and HARD.
some fish just wont do well in our city water