Hi Hoe,
I'm a newbie in planted tank, noticed that you are using DIY CO2, may you share with me your method of doing it?
Because from many ang moh's website, they mentioned 2 cups of sugar to half-teaspoon of yeast, but how big is the cup, they never say.....
So i tried but without success, so need your help. If it's working it should have tiny bubbles from the air-stone, right?

If i am using those 1.5 litres Coke bottle, half-teaspoon of yeast, then how much sugar?
Then water is it 3/4 of the bottle?

Thank you very much, have a nice day