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Zapping mojanos

Paul B

Paul B

NJRC Member
I have posted ways to eliminate mojanos before but this high tech way is the baes, and most fun.
I use 24 volts DC which can't hurt you and I inject it into a mojano with this home made electrode. It uses stainless steel sewing needles in an acrylic tube sealed with a glue gun.

I thought it was the electricity doing the job but now I am now fairly sure it is the gas generated from one of the electrodes that destroys the mojano and not the current.
Here is a close up of the electrode emitting the gas. (I am not sure if it is oxygen, hydrogen or chlorine)
The anemone turns white and totally disentigrates and becomes part of the bubbles.
 
Paul B

Paul B

NJRC Member
IMG_0338.jpg
 
redfishbluefish

redfishbluefish

Officer Emeritus
Officer Emeritus
Paul, you’re a sick man! ;D


My guess is that it is combination of the electricity, the gases (which are oxygen on one electrode and hydrogen on the other), and the heat that does them in. A triple wammie.

Happy zapping.
 
Paul B

Paul B

NJRC Member
Any reason it wouldn't work on Aiptasia too?
Click to expand...

It would work on an elephant if you could get close enough and get the thiong into the water. ;D

Paul, you’re a sick man!
Click to expand...

AAAAAAAAAAHHHHHHHHHH yes, but it's cleaner, cheaper and quieter than grenades and look at the fun I am having.
 
Paul B

Paul B

NJRC Member
The electrode is emitting chlorine, big time. I found a cheap way to make Clorox.
I tried it for a minute in a small volume of water and smelled it, it almost burned my nose off. This is the substance that is oxidizing the mojanos.
I replaced one of the stainless stel electrides with carbon because the stainless steel on the side that does not produce the gas corrodes very fast. The carbon seems to last forever.
 
Paul B

Paul B

NJRC Member
Well the thing seems to be perfected. I replaced the carbon because it had copper in it so I used graphite from a carpenters pencil for the terminal that corrodes quickly. The chlorine emmitting electrode is still stainless steel but it is thinner now. The entire thing is small and compact with a push buton momentary contact. There is a light in it to tell you it is working. Of course the light don't work so it is back to Radio Shack for a different light but that is very easy to replace. I just don't know how long it will work.
The transformer is 18 volts which is rectified to give out DC.
I used a stainless steel spring to connect the graphite to a wire, it coils tightly around the graphite to give a good connection. The spring and wire are encased in clear
"Goop" glue. I use Goop on another thing that I patented for the hobby that stays underwater so I know that will be no problem.
After I do a few more tests, and if they are successful, I will mail it to someone to test.

IMG_0370.jpg
 
Paul B

Paul B

NJRC Member
How did you make this?!?!?!?
Click to expand...

Just like in the picture. The black thing is a piece of graphite from a large pencil and the needle is a needle. Connect one to positive and one to negative on a 24 VDC power supply and if the graphite bubbles, reverse the polarity. It's simple
 
Paul B

Paul B

NJRC Member
does it work?
Click to expand...

Actually, it does. I have found that in a day or two you may find a tentacle still waving so I zap it again. It's hard to tell when you are using it because the mojano turns into a styrofoam looking thing. The white stuff falls off and then if you see some movement, you do it again.
It's real cheap, and fun, for me, not the mojano.
 
Olivier

Olivier

Paul,
the device just like a welding rod. this is not a mojano killer. this is a under water mojano welding. :) basically you use the needle as a shorting circuit (high resistant) that generate heat. do you limitting the current? the current will kill fish. I remembered back in Nam, they use to use the power line to dip in the pond or river to shock all live creatures and catch what ever floating up. mostly catfish
 
Paul B

Paul B

NJRC Member
It would not generate any heat underwater using 300 miliamps. I believe it is the gas that is killing them.
In Nam we used grenades to kill the animals before we swam
 
Olivier

Olivier

Paul B said:
It would not generate any heat underwater using 300 miliamps. I believe it is the gas that is killing them.
In Nam we used grenades to kill the animals before we swam
Click to expand...

yes sir, same but different with fishing with dynamite :). We (kids) used to go to the battle areas and pickup ammo like 52 cal. 40 cal and get the powder make firecracker out of it. we make some firecracker as big as 3" in diameter, light it up throw in water to catch fish. sometime, we stuff powder into a metal pumping pipe and that is a real grenade but dangerous and if the adult find out, we in dippppp $h1t.
anyway, 300mA is quite large current, how long do you keep the pulse of 300mA?
Olivier
 
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