Hyposalinity

Definition

Hyposalinity is the practice of dropping saltwater tank salinity from 1.025 SG to 1.009 SG over 48 hours and holding for 30+ days as a parasite treatment.

Practical use

Effective for marine ich (Cryptocaryon) but NOT for velvet (Amyloodinium survives low salinity). Stressful on fish. Not safe for coral or invertebrates. Use only in a fishless quarantine.

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