What to check before you act

Start with the constraint that will change the choice—tank depth, livestock, flow, light demand, compatibility, or maintenance access. A longer feature list does not make a better fit.

Decision boundary

The recommendation changes when the tank condition, livestock, equipment, or maintenance capacity changes. If the observed problem falls outside this page’s scope, stop at the boundary, collect the missing measurement, and use the related guide before acting.

Recheck: Recheck after the next maintenance cycle or after one variable changes. Record the date, the observed result, and the evidence that supports the next decision.