Xinxin Shao wrote:

I am trying to remove phosphate too. Currently, I am using phos-x. After
1 week, I still got 1ppm phosphate. Are there anyone that can
recommend a good phosphate remover without damage the plant and fish?

Plants themselves need phosphate. In this same thread Tom Barr
recommends 1-2 ppm phosphate. The trick is to have balance in the
nutrient levels. Read Tom's stuff or also read about the Redfield ratio:
http://www.xs4all.nl/~buddendo/aquar...dfield_eng.htm

Fast growing floating plants should suck up phophate and help keep the
level low.