Hi all,

Currently, I'm using small unknown brand HOF (300l/hr) for my 1ft tank but the filter itself could not carry many filter medias inside unlike other familar brands like Dazs or Atman. Also for the past few months, I have to do many WC.

I would like to know at what flow rate is suitable for 1ft tank (31cm x 19 cm x 26cm). And if I'm using BOYU HOF, which size should I go for? Size S or M?

Many thanks.