400 gallon project

[untamed]

Here's an update on my phytoplankton efforts. I think I'm having more success now. This is an example of what I'm currently brewing. This batch has been going for 2 weeks now and still has a rich, green colour. (not the yellow-green that I was getting before).

Although I've played with the recipe, I think the improvement is because of:
1) Daily shaking to prevent anything from settling on the bottom.
2) 2nd and 3rd time using the same bottles. It's possible that the bottles weren't absolutely clean the first time I used them, but now they are behaving better.

I've manipulated the amount of fertilizer in the mix, but get very similar results no matter what I do.