Originally Posted by Lt.
See, my thinking was, if I can tell when it gets above ROUGHLY 30ppm, or 40ppm, then I'll do a change. I see no need to have to use a master kit if j don't have too. There's a serious convenience thing here.
But if you shouldn't ever have an ammonia reading in a healthy established tank. It's the nitrate levels that indicate how much and how frequent water changes need to be done.
By using the master test regularly to begin with, you will get to know the 'rhythm' of your tank. Once you have that information, you can set a pwc
schedule and just test periodically to be sure its all good.