long or tall???

Flex26

Large Fish
Apr 21, 2003
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Delaware County, PA
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#22
I understand the argument for long vs tall. However, what about a 20gL (30x12x12) vs 29g (30x12x16 or 18H)? They both have the same surface area. But the 29g is taller and holds more water. Should this be taken into account as well?