DIY CO2 Generator not bubbling

I have a large gas tank (new lol) .... i put 5lbs of sugar into some warm water...let it disolve. Filled the rest of the gas tank with tap water...added 3 packs of dry yeast from the store ..shook it up... I have it piped with 5/8 drip line to a gatorade bottle with the end of the hose in some water and then another hose to deliver the co2 out the top to my plants.

I'm just not seeing bubbles in the water in the gatorade bottle that signifies co2? Any advice? I also through in another thing of yeast and added some fish food to feed the yeast. First timer here lol

try adding lemon juice or citric acid to invert the sugar, also fish food wasnt the best idea.
Try tomatoe paste.
It actually makes a really good vodka .

also if your not seeing bubbles, it doesnt mean its not releasing the CO2, it just means one of your seals isnt air tight.

It could also be too cold for fermentation.