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Inline Turbidity meters can hopefully be procured to test the outgoing turbidity from each sedimentation tank. This will allow testing how well sedimentation tanks perform over time and during various conditions, such as performance of the flocculator and raw water turbidity.
Ojojona is currently using The operators at Ojojona experimented with a sludge judge to monitor the sludge level, but even with the use of the "sludge judge" it may still be difficult to see all that is happening with the floc blanket, and because floc blankets seem to be fragile, it discovered that it broke flocs and resulted in a turbidity spike. They are no longer using the sludge judge. It will be very important that plant operators adequately understand how have an easy method to maintain and monitor the floc blankets while the flow rate through the plant varies.