Tank-Mix Compatibility
Fertilizer Tank-Mix Compatibility Checker
Mixing two fertilizers in one drum or spray tank? Check first — some combinations form insoluble sludge that wastes your money and blocks nozzles. Pick two fertilizers and get an instant verdict.
Quick reference: never mix these
❌ DAP + Zinc Sulphate
Forms insoluble zinc phosphate sludge
❌ DAP + Calcium Nitrate
Forms calcium phosphate precipitate
❌ Nitrophos + Zinc Sulphate
Phosphate locks out zinc
❌ SSP + Zinc Sulphate
Milky precipitate, nutrients lost
Always do a jar test before a full tank mix: mix small amounts in water, wait 15 minutes, and check for heat, gas, curdling, or sediment.