Additions to water? tea extract, lemon (!), etc?

Does the water need to be "just" water? That's OK, if so--I LIKE water! But also wondered if that extra tblspn of lemon juice leftover from lemonade can be added, or something like green tea extract, or echineachea (oooh, I'm sure I murdered that sp), is all right or to be avoided.

I can understand if the goal is pure water so that there is nothing to filter out--is that it?

Just wanting to vary things a bit...only Day 6 and finding lemonade boring. I AM STICKING WITH AT LEAST 10 DAYS, tho--I will NOT give up, boring or not. :-)

Buckeyes