Quote:
Originally Posted by jason604
Kien how u keep it constantly at that lvl of nitrates? Just test daily and feed more/less? Do u run Gfo n have macro algae? How many hours do u run blues/white lights?
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Well, for me it's mostly based on experience. I don't actually try to keep it at that level. It just happens to fall at that level due to my setup. So, it's not constantly at that level. Or at least I don't think it is.
I've been running bioPellets for the past 5 years, and I know that (for me) the bioPellets don't reduce my nitrates down to absolute zero. I've tested this with a pinpoint nitrate meter and at best they drop down to maybe 1ppm or somewhere near there. My nitrates will read "zero" on standard chemical test kits (API, etc), but I know that it's not really zero. It's more like "almost zero but not quite, probably 1ppm or lower". Again, verified with a pinpoint nitrate probe. If I take my bioPellets off line and just rely on skimming my nitrates will go up and hover around 5. That's just what it does with good skimming and water changes.
I control phosphates with GFO in a media bag and just let it do its thing. With GFO running my phosphates typically drop down to near zero as well. That is, zero as read on standard phosphate test kids (API, hana, etc). But again, I know that this doesn't mean that my phosphates are at absolute zero.
In addition, I think I feed fairly heavily and have a fairly heavy bioload.
My Blue lights (22K T5s) for 12 hours (10am to 10pm) while my halides (14K) run for 6 hours.