Most “mystery” tank issues usually come from tiny things that get missed during the week—leftover food in a corner, reduced filter flow, or subtle behavior changes in your fish. Here’s a beginner-friendly 10-minute weekly reset: • Watch first (2 min): Check breathing, swimming, and appetite before touching anything. • Check equipment (2 min): Make sure heater cycling looks normal, filter flow is steady, and temperature is on target. • Spot clean (3 min): Remove visible debris and clean front glass for a clear view. • Water check (3 min): Test ammonia/nitrite (especially in newer tanks) and do a small water change if needed. The goal isn’t perfection—it’s consistency. Catching small changes early is what keeps water stable and fish healthier over time. This matters even more in the first 90 days of a new setup while the tank is still maturing biologically. What’s one part of your weekly routine you never skip—and one part you want to improve?