I did a 20% water change this morning then tested my water 30 minutes ago. Here's what I got
1. pH stays the same
2. Ammonia still at 0
3. Nitrite still at 0
4. Nitrate falls at 40ppm
Will do another 20% water change tomorrow. Is this correct or after a week ako magpalit? Also, pag nag na achieve ko na ung desired level ng amonia, nitrite at nitrate pwede na agad maglagay ng corals?