yeah i had a 60 gallon that was scratched to holly kingdom come.. i was not going to do that with my 300.
i have never had problems with any water parametes.. but then again i have a 300 gallon tank and 125 gallon sump. I run Zeovit.. that alone takes care of most problems....
i have lots of fish in my tank but with a Deltec Skimmer, fuge full of cheato, and 25 gallon weekly water changes, i dont have any problems...
nitrates and phosphates are 0