What to check before you act

The useful answer depends on the condition of the tank and the decision the keeper needs to make next. Read the practical evidence first, then change one variable so the result can be observed.

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.