So, I've had a cider aging since early February in a carboy. I'm wanting to bottle soon, but when I sampled it today it tasted a little thin. On a recent trip to the LHBS I saw powdered tannin, which should help add body. Is it too late to add before bottling? I plan on sweetening before bottling, could I add it then? If so, I have a 6gal batch, what is a reasonable amount of tannin per gallon? Thanks!