Choosing an LED Fixture by Tank Depth
Volume tells you nothing about lighting. The distance from rim to substrate decides which fixture will work and which will disappoint you.
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5 guides
Why Watts Per Gallon Stopped Working
One rule, two lamp technologies, and the moment a proxy measurement stopped predicting anything useful about what a plant receives.
Low, Medium, and High Light Plants
A species by species table of what each common aquarium plant needs at substrate level, and exactly how each one fails when...
PAR Explained for Planted Tanks
The one intensity figure that predicts growth, where it has to be measured, and why hanging height beats every spec on the...
Aquarium Lighting: PAR, Kelvin, and Photoperiod
Three numbers decide whether a planted tank works, and only one of them is printed honestly on the side of the box.