I just check for the fish I have, the one CBS, the 1 anemone, the 2 brittles, the one orange linkia.
Other than that, no way in the universe to count how many snails, hermits etc in my tank. Too much rockwork to hide in.
As long as my major players are there, and coral I can see looks good, and tests come bcak good, I dont sweat the small stuff.