For me---it's watch your water quality like a hawk. Test weekly.
As you end cycling, ammonia should not be a problem again, because your cycled tank takes care of it. What you start watching closely is alkalinity...8.3 is a good number; and a numerical test for it is a good idea. I use Salifert: it's not the only. No matter what you keep, watch that number.
If it won't stay up, check your magnesium: should be about 1350 (if below 1200, raise it). And if you have stony corals or clams you also need to watch your calcium: keep it around 420.
As you end cycling, ammonia should not be a problem again, because your cycled tank takes care of it. What you start watching closely is alkalinity...8.3 is a good number; and a numerical test for it is a good idea. I use Salifert: it's not the only. No matter what you keep, watch that number.
If it won't stay up, check your magnesium: should be about 1350 (if below 1200, raise it). And if you have stony corals or clams you also need to watch your calcium: keep it around 420.