Hi, I haven't posted here in quite a while due to illness, but I am back in action and need some help. I have been taking care of fish for over 40 years, but starting a new tank is always a trick for me :-)

OK, it is a 40 gallon tank, and I started it out with only one Pleco because they are a good tough fish to handle the cycling process.

I got about a pound of gravel from the LFS and I also used one dose of Stress Zyme for what it's worth, and when I put in the dirty gravel and Stress Zyme, I got a cloudy effect in the water like New Tank Syndrome after only one hour.

Of course there is no sign of ammonia yet, but there are signs of nitrite and nitrate already. I have 2 questions

Should I leave the Pet store gravel in there for a while? It is ugly :-)
Also, will this clear up on it's own or should I start water changes yet?
Thanks!