Just my 2 cents on "stable" tank. I agree with the stable tank advice. However, a lot of people (including myself in the past) dont necessarily understand what that implies. Usually people assume that if you have had a tank for 1 year then its automatically stable. This is not totally true. Stability implies that the water parameters are established to the norms and stay there. For example, even after a year, a tank could suffer from fluctuating pH, alkalinity, Ca, salinity, etc. These also need to be tested regularly and any deviations corrected gradually. In the past I have on too many ocassions been neglient about testing and then made drastic corrections when detected. Which is why I am seriously thinking of investing in a calcium reactor so that water conditions are better maintained.