This is my way of getting lots of bubbles out of yeast method within a couple of hours:
Pour 1 cup of sugar into the cup.
Fill it with warm water.
Pour approx 2 to 3 tsp of sugar saturated water from above not dissolved sugar into other cup, add 1 tsp of yeast and mix.
LEAVE IT ALONE FOR 10 MINUTES. NO
SHAKING. Good reaction will be indicated by a thick foam of yeast in the cup.
In the mean time fill your 2 litre bottle with water/sugar solution and dissolve the sugar.
Add yeast and give it a shake. I keep mine in 22 deg C.
Works like a charm.
55g planeted CO2
ammonia 0 nitrite 0 natrate 5 pH 7.5 kH6
3 Emerald Catfish
12 busy Ottos, 7 Rainbows
3 Clown Loaches, 2 SAE
2 upside down cats