Tap water also contained nirate, nitrite and phophate and some other minerals that might not good for your tank. Ro water or distilled water still the best. Install a RO unit or can purchase distilled water from market. My 2 cents.
Thanks to Mr Naz aka cool guy. He help me to design it. Now I dont know what type of LPS that I should get. As I get a nice gonio but wrong placement and it die therefore I seeking advise here.
For me bio pellet first before rowa and then skimmer. As bio pellet need some food from water to maintain the health of those bacteria.. if all skimmer liao then bio.. less food for them. And are you connecting all with single pump or multiple pump? Just my personal input