水草情迷

I have bought a Boyu EF-05 because the price is very good ($85). I find that it is silent, water flow is good (8 holes all have water flow out). But after 2 days, only 5 holes have water out and other just have droplets (the tube for water out is only half full). Do you know if it is normal for EF-05? Is the filter effective if the flow is such slow? Can I make it faster, such as opening it and close it again? If I buy an Eden 501, is it's flow not like that or just similar? Is it a better choice to buy an Eden 501 (though double the price) since I want to buy one more for my friend?

我唸可能因為我放了綿在裡面，和最近加了泥所以很多dust，等今晚拿走看有沒有改善．

After removing it, the flow is normal. But it is a bit noisy. Decided not to use it.

I have a Eheim hang-on filter, which is very silient and used since 2000. I will use it for my 18" tank.

Just some update. I know why it is noisy - because I put too many additional filtration material. After removing them, I find that the filter is very very silent. It is a best buy for me. Really no much noise even near to the filter. I am happy on my fish tank indeed.