Nullis
Moderator
I've done this on occasion, where I'll have a tea brewing that I used some of, added some additional ingredients and then let that brew another 12-20 hours. Say I had a brew for vegging plants with a lot of high N or Peruvian seabird guano: I would use some of it, top off with some more water, add a little more humus, molasses and some high P guano, let that brew and then use it on my flowering plants.
However, I wouldn't continuously top off and keep adding more ingredients. If not because it is good to start fresh, with fresh ingredients; then due to the fact that the air-stone, tubing and receptacle can become encased in bio-slime and organic matter. This stuff is a pain to clean off of everything if not done as soon as possible.
So far as I am concerned you can know that your tea is full of life by smell and appearance. With all the organic matter and nutrition that is put into tea brewing, if the aerobes weren't thriving the anaerobes would be and you can certainly smell when a tea or compost has gone anaerobic.
However, I wouldn't continuously top off and keep adding more ingredients. If not because it is good to start fresh, with fresh ingredients; then due to the fact that the air-stone, tubing and receptacle can become encased in bio-slime and organic matter. This stuff is a pain to clean off of everything if not done as soon as possible.
So far as I am concerned you can know that your tea is full of life by smell and appearance. With all the organic matter and nutrition that is put into tea brewing, if the aerobes weren't thriving the anaerobes would be and you can certainly smell when a tea or compost has gone anaerobic.