I have a few 30 gallon tubs that I’m growing in, and two of them have
noticeably become hard to strain. The spirulina get caught in the pores
of the 25 micron mesh making straining almost impossible and definitely not
worth the time it takes.
I’ve looked under my microscope with different tub samples on the the same slide
and there is no contamination. The spiral formation is the same, no straight or semi-straight specimens. The only possible difference is size. I notice
when I go from sample to sample I have to adjust the focus, so it’s possible they
have become smaller.
Anyone have any experience with this and more importantly a solution?