Try dipping in coral rx or diluted iodine solution (coral dip) a few times a week. Also shift ur open brain to a shaded and low flow area for the moment. Reducing the photo period will also help.
Thanks for the advice but I still thinking how to cut off those base that sps is encrusted to, u know those sps from GO? Any idea? Do u usually remove those base rocks before gluing the frags to your rockscape? The base can be a little too big IMO sometimes.
Yes, u r right in that sense but then it will limit the no of corals u can keep. Need to plan the scape properly. Can alw upgrade in future, start with 4 tubes and stock slowly.