I posted this last night on few other frog forums. Since this applies to terrarium's and since I got few requests to show some pictures, I figured I'll re-post a detailed version with pictures. Originally I used 4 containers, I repeated the procedure with 3 dry ice containers.
Here's somewhat edited original post
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Just wanted to update everyone on my recent successes !!! You guys might already know that I was fighting with infestation of slugs and millipedes in one of my tanks. This was in my 90gal diamond shaped. Millipedes got so bad that I had probably hundreds of them crawling all over the tank...it was disgusting !!! I did not want to rip my tank apart because I put a lot of work and money into making the background and water features, foggers, lights, etc.
I wanted to kill only millipedes and slugs, but nothing else. Pesticides were out of the questions, since my frogs had to eventually go back into the tank, I would not consider any toxic chemicals either.. I started experimenting with CO
2 . It's heavier then air, thus easy to put into a tank. Any bug will eventually need air...I looked into getting a CO
2 tank, but it turned out too expensive and not worth the hassle.... I used dry ice instead.
Here's what I did....I'm extremely excited, because my idea worked flawlessly for me and I'd recommend it to anyone with similar problem.
I was a bit concerned with using dry ice, because I was afraid it will lower the temp and kill my plants in the process, so I took a few precautions.
I put 3 x 32oz containers partially filled with dry ice. I didn't want to leave them in my tank and let the dry ice naturally sublime into CO
2 for the fear that I will lower the temp and kill my plants. After all they're all tropical and dry ice is -78.5'C = -109.3'F. I decided to make the CO
2 really fast.
I poured hot water over it. ... it was quite a show. I wanted maximum CO
2 production without slow temp reduction. It looked great and there was a lot of CO
2 produced.
While I was doing it I made sure I had the top of the viv slightly open, so the CO
2 could displace any air that was there.
I then took the containers out and placed them right above the tank and let the CO
2 slowly by gravity fall into the tank to further displace any remaining air.
Once I was satisfied that all air was displaced, I closed the viv. In 30 min, all the millipedes were dead or dying... All slugs were dead...Plants are so far a OK! I will reply in a few weeks to let everyone know how the plants are doing. I'm leaving the tank filled with CO
2 overnight to make sure everything is killed in there.
Tomorrow I will shop vac all the dead millipedes and any slugs I can find. I'll exchange the air, etc
I will repeat the process in a few weeks to make sure that anything that hatches from eggs is also killed.
This sounds to me like a safe way to get rid of any nuisance you have living in your viv or on your plants. If you have some bug on your plant, why not put it into a tank filled with CO
2 for a day?
Make sure that you are in a ventilated room... You don't want to do yourself in. Contain the CO
2 to the viv only!!!
Ahhh, victory at last !!! I waited a long time to see this next Picture...DEAD MILLIPEDES !!!! YIPPPPEEEEE !!
Let me know what you guys think of my un-orthodox, pesticide free method
Marty