How to Boost Spirulina Growth Using Volcanic Rocks

Last updated on June 7th, 2023

You know that feeling when you discover that something you thought you knew better than anything suddenly surprises you?

Well, that’s how I felt when my organic spirulina culture told me about this awesome trick. I’m saying it told me because growing Spirulina successfully requires you to actually communicate with it as if it was an actual person or pet. If you watch and listen carefully, spirulina will communicate through the way it behaves. Indeed, growing an organic spirulina culture and looking after it daily definitely helps to understand its nature, especially at these strange times when the weather keeps changing from one extreme to another, leaving it vulnerable to all sorts of turbulence.

How I reached my big discovery about growing an organic Spirulina Culture?

It all began with a fatal mistake a few weeks ago, when due to a major storm which was rather unusual to my part of the world, my spirulina suddenly got cold, thin, and didn’t look very good generally. I suddenly remembered that it’s been a long time since I last cleaned the tank, and decided to treat my spirulina with a fresh clean home.

I began taking out all the equipment one by one: The water pump, the air pump, the heater, and lastly, the volcanic stones I had put in it when I first started out. I rinsed everything and cleaned it thoroughly, but when it was time to put it all back, I stopped for a minute and thought- “why do I place those stones inside anyway?”

make your organic spirulina culture thrive

My initial assumption when placing them in there was that as a volcanic lake inhabitant, Spirulina would enjoy having something familiar to grow around, and since visiting the Golan heights and finding just the right type of stones, I decided to give it a try. Since then, it’s been absolutely fine for almost a year, but it never crossed my mind that the stones had anything to do with it.

Guess what happened when I took the volcanic stones out of my Spirulina tank?

I was shocked to see the difference after only a couple of days. While normally a general clean-up could only do good, this time it was looking all sad and grumpy, and the color began deteriorating till it was nearly yellow! For about two whole weeks I did my best to bring it back to life, but despite a slight improvement, it still wasn’t as good as it had previously been.

And then I thought that maybe, just maybe it would help if I put those stones back in. I didn’t really think it would work, it was more like a desperate step after trying out everything else with no success.
Then, after I took two stones from the garden and back into the tank, something amazing happened. Within several hours, it went back to its healthy blue-green color, and within a couple of days, it was already thick and ready for harvest!

What I learned

Firstly, that I should always listen to my intuition, even when there’s no apparent proof that it’s actually right.
Secondly, that resembling the natural environment makes my Spirulina culture thrive! This gave me some ideas for further research, for example, what would happen if I plant some volcanic plants next to (or maybe even inside) my tank?!?!
Whatever happens, I’m definitely going to write about it in my book!

4 Responses

  1. Joseph Reply

    Very interesting that apparently the leachate from your rocks gives spirulina needed minerals. I would like to measure the TDS of your tank water. Could I get the same results if I incorporated volcanic rocks from the local soil yard? I think I would do that with a second tank as an experiment. Thanks for the interesting article.

    • Natan Gammer Reply

      I suppose that should work, but you’d need to make sure they are purely basalt sones, as opposed to a cluster of different rocks that have been conglomerated. Also, they should be natural stones that have not been treated in any way.

  2. George Reply

    I would never expect such a result! what a great story!

    Just a quick thought: if the stones have high porosity, is there any chance that the medium was somehow trapped inside them?

Leave a Reply