It sounds like you have a 20 gallon long (20L) tank, instead of a 20 gallon high (20H) tank. The 20 gallon long tank is about 6 inches longer in length, so I would recommend the screen size for 20L, 29 gallon. (Bear in mind that 29 gallon tanks are the same length and width of a 20L, they're just taller). Hope this helps.
answered 1 month, 2 weeks ago
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