Originally Posted by Dingodan
well suppose i only do monthly water changes...?
That's not very healthy for the tank in ways other than elements for the coral. Not really sure what LPS
you have but most aren't that hungry for calcium. Again I recommend not only doing monthly water changes. Maybe bi-monthly. But if you were to test to see if you needed to dose, then dose to the needed amount and then test before a water change. If it is still in the accepted range you're fine. I've never dosed in my nano and I have hammer, acan, meteor shower, and Duncan coral. Just bi-weekly water changes.