RO or City of Edmonton Water?

[rocketlily]

I was at 2 quality stores today and was given two different opinions, as to the type of water I should use. My tank is 1 week old and the PH is a little low (7.9) One store told me never to use RO water, as it does not contain any minerals. Another store told me to only use RO water and a high quality reef salt which adds the minerals, never, never use Edmonton water as it is too high in ammonia levels.

Our water is well water, that cannot be used for tanks, so I have to either buy City or RO water. I would really appreciate some feedback on this.

Thank you