germanyt
Aquarium Advice Freak
I felt like I wasn't getting quite enough CO2 absorbtion because the airstone was creating too large a bubble. I know it was working a little but I wanted better. I drilled a hold in the bottom of the intake tube and stuck the CO2 line directly into it so the impeller fan is now churning up the bubbles and sending them through the filter and then churning it further by pouring it back into the tank.
And I guess this is a good fertilizer. Something's better than nothing I recon.
And the new substrate.