Aquarium Lid Guides
What to measure, what a lid is made of, and which fish will find the gap. Each one ends at the configurator.
Measuring
How to Measure a Rimless Aquarium for a Lid
The three numbers a custom lid is cut from, where to hook the tape, and what to do about braces, filter chambers and overflows.
Read the guide →How to Measure for Custom Cutouts
Width, depth and clearance for a light mount, a cord or a hang-on filter, measured from the outside of the glass.
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Choosing a lid
Mesh vs Glass vs Acrylic Aquarium Lids
What each kind of top does to gas exchange, evaporation, heat and light, and which one suits a reef, a planted tank or a rimless display.
Read the guide →Fish That Jump Out of Aquariums
The saltwater and freshwater species most likely to end up on the floor, why they do it, and how to close the gaps they use.
Read the guide →DIY Screen Top vs Custom Polycarbonate Lid
An honest comparison of a window-screen frame you build yourself and a lid cut to your tank: cost, fit, feeding, cutouts and how each ages.
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Already know your tank?
Lids for 180+ models are drawn and priced. Pick the brand, add a feeding hole and cutouts, approve the proof.
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