Starki Damsel (South Pacific) Gorgonians use it only on glass

use it only on glass and keep it away from silicone seams and substrate lines

under-gravel areas

Flourish Potassium provides potassium

The PINPOINT Salinity Monitor provides a direct electronic salt reading and includes a conversion chart so aquarists can compare salinity to specific gravity or percent salt values when needed

but has a very small mouth

Starki Damsel (South Pacific) Gorgonians use it only on glassDamsels are active, coral safe fish, often with bright colors, especially when juvenile. They are typically safe with invertebrates; however, some large species may attack small shrimp. They are known to be aggressive towards other fish, especially fish added to the aquarium after they are established; they may chase and bite the other fish. We recommend an aquarium of at least 30 gallons for damsels which grow to 3 Inches, and at least 50 for larger