Can anyone offer a suggestion on reducing my nitrates? I'm going to do a water change in a little bit (have to wait on my silly RO to make enough fresh water). But, while I was preparing, I did my weekly labs and came up with nitrates at 30ppm. Everything else is good (if you want the laundry list, I'll post it on request), but that's too high (or so I've been led to believe. Corrections welcome). TYIA!!