Finished DIY Co2 be toxic?

PaulJ69

CP addict
Mar 18, 2008
1,186
0
36
37
NJ
Hi, about an hour ago i went to go check on my planted 20gal and i eventually found my Dwarf Gourami floating, I got to touch him and he flipped his fin and sprayed me. He then goes to the bottom kinda life less but exerting an amount of energy some times and then he just layed on the ground lifeless. I tapped on the glass and nothing. I tested the water and did a water change while all of this was happening just to make sure nothing was bad. Everything was normal. I noticed my drop checkers were blue. I have my DIY Co2 going directly into the intake of my cansiter filter and the drop checkers are normally green. So what I was wondering if after the DIY CO2 is finished could it possibley produce a toxic gas and would get sucked directly into the tank and kill my fish? Sounds like a long shot but I just dont know what killed him. All the other fish are fine. And just to be sure I uncapped my Co2 and am going to redo it soon. Any help?:huh:
 
Ph: 6 which has been that way forever w/ or without co2
ammonia:0
Nitrite:0
Nitrate: I didn't test, I normally don't test because my plants like the nitrAtes.
So I really don't know.
 
canister is working fine and everyone else is health and still alive.
 
Well, I'm not certain what to suggest. It may just be coincidence, but your DIY mix wouldn't be putting out anything once it quits putting out CO2. If your mix got out, your tank would cloud over big time. pH will drift up some when the DIY craps out, but that won't hurt anything (yes, I'm disagreeing w/ NickD here).

If the canister crapped out for more than several hours, things could go anaerobic in the can and start leaching nasty stuff into the tank but if it's working, that isn't it.

I'd say go ahead & do a NO3 test, just do you can rule that out...(agreeing w/ NickD on this point).
 
tested the No3 and it was about 20. so that's pretty normal for a planted tank
 
What was your pH? Loss of CO2 could cause a big pH swing. Did you also test ammonia, nitrite and nitrate? What are those numbers?

doesnt matter what the co2 changes the pH to, it's not a low-buffer swing... the pH changes caused by co2 have no effect on the fish.
 
Ph: 6 which has been that way forever w/ or without co2
ammonia:0
Nitrite:0
Nitrate: I didn't test, I normally don't test because my plants like the nitrAtes.
So I really don't know.

What pH test kit did you use? The normal pH test kits only go as low as 6.0 pH, anything below that will look the same..
 
AquariaCentral.com