Spawn234 - I know you are from Newfoundland Canada which has different quality water than others.
My self personally... I would NEVER drink water that has not been through a professional/municipal system, here, where I live.
When I visit family in other states, I have no problem going to a stream and drinking straight from it.
Personally my tap water is chlorinated heavily and there are other chemicals leaching from pipes that were in place well before my parents were ever here. Not that it makes a difference, but each location is different.
When I first setup a SW tank, and way before I even thought about researching it from my fresh days, I used tap water and a dechlorinator. Everything was going good... Then I started to see algae...
Yes I agree lights, feeding, rock, the list goes on. But not long after that I read up about testing, not only the tank but what I was putting in the tank.
Your tds of 6 is very nice compared to others.
I know you say that you do not have to test. Is this a well system or a municipality?
I ask because I have a friend that uses a well system and uses it in his tank with zero problems. We want to take his water to get a full test just to see what is under the surface.
I had mine tested professionally and while it is good for human consumption there are a few items that make me want to get a whole house system.
I wonder what yours would look like if it was tested. I personally love fresh crisp water.