Having a hard time getting my nitrates up to where I want them. Have a 75g display with a 30g sump. Drain is single drain split going to roller mat filter and other side going to fuge. Also run a BM curve 5 skimmer. System seems to be working too well. Lol. Is it possible to close the valve to my fuge and just open it up a couple days a week to try to get my nitrates up to where I want them? I’d rather not dose if I don’t have to. And I feed way more that should be necessary for the livestock I have. Also just thinking about shutting down the fuge all together and just running the roller mat and skimmer. Any advice one rumming the skimmer on one day cycles every third day or so?