One-way risk signals
Ingredients
These entries exist to raise warnings, not to issue clearances. Knowing a product contains copper tells you a great deal; knowing it doesn’t tells you almost nothing.
Ingredient context · illustrative3 ingredients
Copper
Manufacturer pages for Cupramine and Coppersafe explicitly instruct keepers to remove invertebrates before dosing their copper-based formulations. FishyMag uses those first-party warnings as a one-way risk signal, never as treatment advice.
Source-linked caution for: shrimp, snails, marine invertebrates · 2 treatments in the database
Malachite green
ParaGuard lists malachite green and its manufacturer advises a reduced starting dose for scaleless fish. That formulation-level instruction creates a caution signal for products listing this ingredient; it does not establish that the ingredient alone causes the sensitivity.
Source-linked caution for: scaleless fish · 3 treatments in the database
Aldehydes
ParaGuard lists aldehydes and its manufacturer declines to market that formulation as invertebrate safe. FishyMag carries that formulation-level uncertainty forward as a caution signal, not as a claim that every aldehyde formulation has the same compatibility profile.
Source-linked caution for: shrimp, snails, marine invertebrates · 1 treatment in the database
FishyMag reports what manufacturers say, quoted and linked. It does not diagnose illness or recommend a treatment, and it never infers that a product is safe from the absence of a warning — where no statement exists, it says so.
Formulations change. Always read the label on the bottle in your hand, and contact the manufacturer if your tank contains anything valuable or unusual.