? On topping off a res with jack 321

keepittrucckn420

Well-Known Member
Hello all. As I’m slowly dialing in the jacks I had a question about my water changes. So my pump leaves about 5 gallons at the bottom of the res, so my question is do I need to completely empty the tank before mixing the 321 again. Just curious if there will be any falling out of the nutrients since there is some cal nit from the time before? Thanks!
 
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