Nitrates in tapwater.

[BuZz]

So I haven't tested my water in a long time, and with the new wild caught fish, I figured it would be a good idea. Ammonia was good at .25 or lower. Nitrites good at 0. Nitrates were high like maybe around 80. Did a small water change tested again today. No change. So I decided to test my tap water, Nitrates were 10+ maybe even closer to 20. Checked the water out of my neighbors tab as well, same result. If I age tapwater will nitrates bleed out like chlorine does? If not, what type of bottled water should I use?
 

[teachskip]

Your ammonia should be at 0ppm unless you have dead fish, dead plants or uneaten food in the tank. A nitrate level below 20ppm is considered acceptable but the lower the better. Keep up with the water changes.

Skip...

[BuZz]

Well, the low lvl ammonia reading was from a tank that was newly seeded by filter media and rocks from my other tank, so it may be going through a mini cycle. Anyway, I should probably know this as long as I have been keeping fish now, but I have never really had a problem like this in the past. But my question is, it is ok to do daily (approx 50%) water changes till my water quality gets where I want it, is that correct? I am pretty sure it is, but I just wanted some confirmation that it is not detrimental in any way to do water changes that often.
Thanks

[teachskip]

Water changes are fine but some Tangs don't respond well to frequent or large water changes. I would suggest smaller and less frequent ones.

Skip...