Yeast Starter as CO2 bioreactor for Aquascaping

[squeegeethree]

As a life long aquarium owner I’ve decided to up my planted aquarium game. The professional Aquascapists use CO2 to promote plant growth.
I figure I waste all the CO2 that is a by product of my brewing hobby so why not utilize it.

[squeegeethree]

[squeegeethree]

The Yeast starter flask leads to a splitter where I can divert the flow from the tank or send it to a bubble counter with a diffuser that enters the tank. The plastic sphere is a CO2 monitor that turns green when optimal, blue when minimal CO2 and yellow when too much for the fish.
The plants are getting healthier since installing.

[sneezles61]

Very interesting…
Sneezles61

[squeegeethree]

Oxygen pearls as a result of all the CO2 in the water

[mrv]

That is really cool. Does the oxygen dissolve into the water or just float to the top?

[squeegeethree]

Both. When it hangs on like this on the plants the bubbles do slowly reduce in size. Here is a picture of the bubbles just streaming off of the plants. The yeast for this batch is for my next IPA.