Mekaeel - Andrew: You guys are 100% correct. The same goes for salinity, pH, level of oxygen, amount of POC's and DOC's in the water, etc., etc.....
Now - that's not a bad thing for our tanks, as such, depending on the following factors:
1) what do you aim to keep? (or what are you currently keeping?) - a REALLY EXOTIC work of art consisting mostly of SPS corals? Or a soft-coral/LPS tank with some fish? Or a more natural "garden reef" tank? Fish only tank?
2) whether you have a HUGE mother of a skimmer that can take out the "crap" in the water, IF these parameters are unstable
3) are you dosing any chemicals?
4) do you have a phosphate reactor?
5) how big is your system? (water volume)? that the water changes with the ever-changing parameters, does not have such a big effect on your tank....