first reef, is tapwater safe in a starter nano?

[kwirky]

Here's my DIY nano system:

(the lights were only on for the picture)

- 33 gallon divided in half for large sump/fuge (and to cut cost in liverock/lighting needed lol)
- it's got 20 lbs of indo rock from Gold's
- using a 220 gph powerhead for the sump return (diverted by the hose to the back of the rocks)
- using a 150 gph submersible mag for extra flow during the curing process
- two coralife mini aqualights (18w each) across the 18"x12" top
- using tapwater
----nitrates/phosphates are both show undetectable from the tap. aquarium pharmeceuticals testkits.
- just started the curing process today. planning to change 4 gallons every day to give a chance for the crab hitch hikers to survive.

anyone else in calgary have experience keeping low light corals in tapwater? the guys at gold's told me it's fine until I move to brighter lights, so long as I keep an eye on the water before I put it in the tank, and use RO water from a store if the water is in a bad spot. I'll be changing 4 gallons of water every week.

their nano on their counter (5 gallon hex with single coralife mini) has been running off tapwater for a year, but somone on reefcentral said I should get an RO because tapwater's untrustworthy.