LeighMo wrote:
Can it be possible to have a planted tank which is 10gals or less(2.5gal)?


Yes, it's possible, but it's difficult. See Amano's second book. It features
small planted aquariums, many under a gallon!

But it's a lot of work. You have to choose plants and fish very carefully.
You may also find that you need a lot more light per gallon than you would in a
larger tank.

[snip]
Leigh

Tell me more, I'm interested: why do smaller tanks need more
light/gallon? Because crowded plants shade each other more?

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