The amount you need varies greatly.
Generally I'll say 36W to 72W of light, varying according to your plants' needs and density.



The amount you need varies greatly.
Generally I'll say 36W to 72W of light, varying according to your plants' needs and density.


wad abt riccia?
how much light shd i have for my 2 ft?

Assuming your tank is entirely Riccia and it's a 16 gallon (56 litres) standard 2ft, I'd say 55W should give you nice pearling, coupled with good CO2 and nutrients of course.

for 2ft tank used 55w...![]()

spend more on nutrients to get nice and healthy riccia's.
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