Step sludge and residue with a sludge judge to confirm pumping requirement

https://wiki-neon.win/index.php/Budget-Friendly_Septic_System_Cleaning:_Expert_Tips_and_Local_Providers

Measure sludge and scum with a sludge judge to verify pumping requirement, then mix contents carefully to suspend solids so the vacuum truck removes both layers, preventing blockages and early refilling.