Hi! I have a fairly heavily planted tank (Red Sea Reefer 350), but can not get my nitrates down to a reasonable level. The tank is consistently at the highest level on my API test kit and my tap water is in the 20ppm range. I am using sand as my substrate, but about a month ago introduced two BCB baskets into the sump and have been putting laterite under the sand bed through the ice cube method for the past few weeks as well and have not seen the nitrates drop at all. What can I do to get these down to a normal level?
I'm thinking I need to switch to RODI? Do I need to remineralize at first, or should I be putting in pure RODI until the levels lower? Is there any other solution?
I'm thinking I need to switch to RODI? Do I need to remineralize at first, or should I be putting in pure RODI until the levels lower? Is there any other solution?