Okay, I've fallen a little behind in minding my wines. I usually do the first rack within 7-10 days, but I have two batches now (fruit wines) that are around three weeks in (never racked over). I am planning to rack over this weekend, and I'm wondering if I should add K-Meta? I wouldn't normally add it at the first rack but now it's so far into the process I'm wondering if I need to for sterilization/avoiding oxidation...?