that's one great looking plakat, i bet he appreciate the aquascaping too.
silly question but what does HC stand for. I'm looking for a good foreground plant and i currently have glosso and they're's still too tall for my 5 gallon. So i think that the HC would be great but i don't know anything about them....yet.
The only thing I measure is the sugar I use one cup and I have a container with yeast in it and I take a big pinch out of it and thats it.
Heres one you can try to replicate that works very well.
Use a 2L soda bottle.
1. 2 Cups of Sugar
2. 1/4-1 teaspoon of yeast (more yeast = faster reaction = more CO2 for shorter time (2+ weeks))
3. 1/4 teaspoon of baking soda (optional)