Why a Culligan RV Filter Won't Purify Water for Carnivorous Plants

A grower asks if a Culligan RV-800 KDF filter (sediment/large particle) will make tap water safe for carnivorous plants.

Answer

No. It only removes sediment, not dissolved minerals (TDS). Only reverse osmosis (RO), distillation, or rainwater reliably produce safe water. Rarely, tap water is naturally low TDS. Best: buy a TDS meter (HM Digital TDS-EZ, ~$20) and test. Join FlytrapCare Forum for more help.