I have a question for you since you seem to be growing it well.
I have had a ball that is about the size of a softball for a while now. It has not really grown at the rate I expected. The person who gave it to me said he harvests it about once every two weeks. Mine is not growing nearly that fast. It looks healthy but is not growing rapidly.
Are there any conditions that need to be present, other than nitrates, for the algae to grow?
Thanks.
Josh