Use nonionic as a tested alternative
A low-charge or nominally nonionic profile may be useful when strong ionic interactions do not favor a conventional anionic candidate. It should be treated as a trial position, not a universal answer for low pH or low turbidity.
Keep particle type, dissolved ions, coagulant residual and solution quality visible when comparing candidates.
Hold preparation and dose constant
Prepare every candidate with comparable water, concentration, dispersion and aging. Compare on active polymer rather than product mass so differences in formulation do not distort the result.
Record clarified-water quality, floc resilience, settling, filter response and any narrow operating window across representative source-water conditions.
Define where the grade is valid
Write the successful water-quality range and addition sequence with the selected product code. Re-screen when source, coagulant, pH control or recycle-water contribution changes materially.
A supply quotation should connect the sample to the commercial grade, package, current SDS, COA expectations and destination.