Let me start by saying – this little jar of powder has saved more fish lives in my tanks than I can count. Whether it's mysterious lethargy, early signs of parasites, or that dreaded "lying sideways at the bottom" situation, MetroPlex has been my go-to remedy for years.

The magic happens when you mix it with Seachem Focus to create medicated food. Pro tip: Use frozen bloodworms as the base – the fish go crazy for it! I've had zero issues with medication rejection (though some keepers swear by adding garlic). Watching previously listless fish suddenly swarm for their medicated dinner is oddly satisfying.

What truly sets MetroPlex apart is its reef-safe formula. Unlike harsh treatments that nuke your entire tank, I've dosed this directly in displays packed with sensitive corals and shrimp without casualties. That said, the food method is more targeted – perfect when you spot-treat new arrivals in quarantine.

The turnaround time shocks me every time. One user mentioned improvement overnight – I've seen similar miracles where fish perk up within hours after weeks of decline. For stubborn cases, the every-other-day dosing over a week provides sustained treatment without overwhelming delicate systems.

Two minor gripes: The powder clumps easily (store with silica packets!), and first-time users might panic when it temporarily clouds water. But at this price point? Always keep a bottle stocked – because fish emergencies never happen at convenient times.