Just curious

[Dearth]

Just out of curiosity

Every tank is different no two will exactly ever be the same so the answer to this question could vary greatly

What indicators to you usually look for in your overall tank health and whether or not you take action to correct the issue?

For me I watch my Fish if there is an issue with the tank they always hide in the rocks and won't swim in the open usually it's from a death in the tank usually snails or a water imbalance quick test usually fixes the issues.