honestly *hangs head in shame* I rarely check my water parameters unless something is going wrong visibly (fish dying/cloudy water/murky water/fish acting weird). I do my regular water changes, check how things "look" every day, and try not to overfeed. But, my tanks have been running for a couple years. I try not to overstock, keep up on the water changes, and don't overfeed. If anything bad happens then I will test the water, other than that, I rarely test the water.