Possibly. Flourish Tabs™ are exclusively intended for freshwater planted tanks and not every type of aquarium fish is suited to this type of environment. Research your fish to know what kind of aquarium environment they prefer.
A note about copper:
Copper has a bad reputation for building up in aquariums to the point of harming delicate invertebrates like shrimp and snails. This reputation comes from the widespread use of copper-based medications as well as the occasional use of copper plumbing in older houses. While it is true that high levels of metals like copper can be extremely stressful or even deadly to invertebrates, these same metals are absolutely essential to invertebrate and plant health in low concentrations. That is why there is copper included in Flourish Tabs™, Flourish®, and Flourish Trace™ - it is necessary for the health of plants, fish, and even invertebrates. It is nearly impossible to overdose a tank on copper through use of Flourish® products alone - numerous gross overdoses over an extended period of time would be needed to accomplish this.
Flourish Tabs™ Compatibility Guide
Green: This product is safe for these tank inhabitants. Take care to avoid sudden large shifts in water parameters within the tank, and review the dosing instructions carefully to avoid improper dosing.
Orange: These tank inhabitants are more sensitive, and while the product can still be used on them, it's best to start with a partial dose and work up to the full dose over time.
Red: This product is either notably stressful or utterly unsuitable for these tank inhabitants. It would be best to opt for a different product if possible. Click tank inhabitant name for alternate products.
Black: There should never be any need to use this product in a tank with these tank inhabitants - we have no data as to compatibility for this reason. Click the tank inhabitant name for alternate products.
| Freshwater Community Fish | Saltwater Community Fish | Scale-less fish |
| Sharks | Rays | Eels |
| Freshwater Sharks | Freshwater Rays | Freshwater Eels |
| Loaches | Catfish | Aquatic Frogs |
| Shrimp | Snails | Clams |
| Plants | Corals | Exotic Invertebrates |
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