No problem that's what fishlore is about.

I'm not sure I understand what you mean. Bacteria blooms are usually what cause water to go murky, especially during cycling. Once cycled these blooms will likely occur whenever the bacteria population is disturbed, after a filter cartrige change, if you swap substrate. ect.
There are a few other things that cause murky water as well such as not rinsing gravel properly.
That help?