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I ordered from LR.com and had very little die off. Not enough to create even the smallest ammo spike. The end recommendation is 1.5-2#/g. I started my 120 with 80# of base when I setup my tank and added 60# of LR about 3w into the cycle. I wouldn't count on LR.com rock for cycling purposes because it probably won't but you could put a raw shrimp in there to start the cycle process.