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Thanks jamie for the clear explanation. But one contradicting things about using the bio pellets which u mention about is using bio pellet to remove NO3 but on the other hand u need to dose nitrate to make sure the redfield ratio is correct if not there will be problem controlling PO4. Qns is if that is the case y should we remove nitrate? I hv been reading thru quite a few forum,online articles there are successful stories of having ULN tank and high nutrients sps tanks. And i was looking thru those pics and i was thinking most of their tanks are full of corals and most pple saying corals need little NO3 and PO4, will it be the case because they have so much coral and the coral absorbs most of them and gave out different nutrients which reefers don't measure that made the tank thriving? Sorry if said something wrong i'm still very new in this hobby just wanna know more stuff which is unclear for me. Sent from my iPad using Tapatalk

would this be sufficient for my 2ft cube? http://www.madpetz.com.sg//index.php?main_page=product_info&cPath=&products_id=612