Heater controller mandatory (Inkbird ITC-308 = $30 insurance against $2,000 tank loss)
Heater rated for tank size: 50W=10g, 100W=20g, 200W=40g, 300W=75g+ for redundancy
Bury heater horizontally near sand for even heat distribution
LED light mounting: use a fire-rated wood stand backing if mounting on a flammable surface
No incandescent bulbs above tanks (fire risk + heat damage to acrylic)
Battery air pump for power outage = also prevents thermal stratification overheating
Never tape over LED vents (overheats + dies in 6 months)
Browse all aquarium safety articles. Pair with emergency response guides.