How Much CO2 is Bad for Fish?

[janky]

So I'm not sure if this is the right section for this question, if not, sorry mods.. please let me know.

Basically I made a DIY CO2 setup for my plants using a 1 liter bottle, ½ cup sugar, and ½ tsp. baker's yeast.
It's been giving off a good amount of bubbles through the air stone, so I'm happy that it's working, I just want to make sure it's not going to be making my fish sick (or dead).


Advice?

 

[janky]

Any one have experience with this?

 

[jetajockey]

30ppm is around the target area that most people use. The simplest way to check the level is with a drop checker /4dkh reference solution.

 

[janky]

30ppm is around the target area that most people use. The simplest way to check the level is with a drop checker /4dkh reference solution.

Ok. I'll have to look into that. I just made the cheap pop bottle setup to get some in there, I've had it in overnight and most of today. I was trying to avoid an expensive setup since I only have java fern and anubias (which I was told don't really NEED CO2 but it would help them grow).

Should I just leave it in for another day and then take it out? Or is there an incredibly cheap solution I can pick up at the lfs to test?

I doubt I'm anywhere near 30ppm tbh...