I'll just quote someone I trust on this board to sum things up and that is a Steve.
" I have not seen that test before. Honestly, I'm all for keeping it simple and I don't test the water unless I feel something is very off. If things are going smoothly, I might wait a bit before a cleaning or change. If things are messy (lots of loose poop), then I'll go ahead to change sooner.
When I do change my tank and filters, I will reevaluate how I'm conducting business."
Quite simply if it works that's what counts and I have had great success with my 1500.