hi bros here. any filter to recommend me. my tank is not a heavily planted tank, only some plants does does not need c02 , dimension is about 38L or about 9 gallon. any recommendation for me. i am using a internal dolphin filter, but 2 weeks only, sound start to appear and the flow rate decrease though of changing to either Hang on filter or either small canister filter like eden 501 model where i can hang it. thanks for recommending. rearing some fish but maybe will include shrimp later on.