Exterminating Ostracods

Mightymouse1111

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Here is a link to my original post: http://www.fishforums.net/index.php?/topic/365932-wierd-bugs-in-aquarium/

A recap and my plan:
I have a 2 gallon heated and filtered aquarium housing a successful cherry shrimp colony as well as hornwort, java moss, and a grass type plant. I recently discovered an infestation of what I believe to be ostracods/seed shrimp. I understand they are harmless but they make for quite an eyesore. There are large dark ones at the bottom that feed on anything I give the shrimp, and also clear/white smaller ones that zig-zag all over the glass. I don’t want this spreading to my other 3 tanks and am cutting my losses now. I’ve read that ostracods are difficult to kill because they are basically a shrimp body inside a clam shell and can close up inside for extended periods of time when water conditions are bad. Because cherry shrimp and ostracods are so closely related I’m hoping to chemically (or some other way) kill all crustaceans in the tank, but save the plants for the next inhabitants. I was very patient waiting for the java moss to attach to the wood in this tank! Anyway, I’m planning on a cocktail of Paracid, Anchors Away, and possibly Heartgard.
Paracid’s (http://crystalclearpond.com/TechnicalData/Paracid.pdf) active ingredient is trichloracide, which is an acetylcholinesterase inhibitor. It prevents the neurotransmitter acetylcholine from breaking down leading to death.
Anchors Away’s (http://www.pondcrisis.com/a_dimilin.html) active ingredient is diflubenzuron, which inhibits the production of chitin. They molt and die.
Heartgard’s active ingredient is ivermectin, which is binds to glutamate gated chloride channels causing an influx of chloride and neuron hyperpolarization. This leads to paralysis and death as well.
I’m pretty sure that trichloracide and diflubenzuron are both plant safe, but I haven’t checked on the ivermectin yet.
Other ideas?
Nitrate overdose. Can I give a dose of nitrate or some other nitrogen compound toxic enough to kill everyone but not hurt the plants? Any fertilizers that would work for this? Has anyone ever heard of trying this?
Salt overdose. Can freshwater plants survive if salt is added?
CO2 bomb. This will keep the plants alive but will it kill ostracods?
Soda water. I read that adding soda water will quickly kill inhabitants but spare plants.
Increasing or decreasing the pH. How low or high can I make the pH before the plants will die?
Natural predators would be great but that doesn’t prevent the spread, just the eyesore, and I don’t want to buy natural predators for all 4 tanks.

If these don’t work, then I’m resorting to Coppersafe, but that will probably kill the plants. If that doesn’t work, then I’m bleaching and starting over.
Please redirect me if this will get noticed more in a different section.
Thanks for the help!
 
2 gallons? Why not just remove the plants and shrimp (give the former a good rinse), empty the tank and start over with fresh substrate? Can't be much effort with a tank that size.

I really don't understand people's desire to bomb any errant microfauna with chemicals at the first opportunity...
 
seems unnecessarily cruel to me. I had seed shrimp in a fishless tank once and found them quite enjoyable to watch IMO. I don't see why the shrimp need to be killed just because you don't like the look of a harmless relative of theirs.
 
It would be impossible to separate the shrimp and plants from the ostracods, there are several thousand if not millions of them in the tank. I'm trying to avoid losing the plants and so I was going to treat them in the tank where the ostracods are. Otherwise you are right, I'd just through everything out and start over. I still will do that if nothing work. There's little substrate, it’s almost bare bottom, except for about 3/4 cup of crushed coral. I'm not looking to decrease their population with substrate changes either, I'm looking to exterminate them to prevent their spreading to other tanks.
I am caring for a friends tank (which is where the ostracods originated) this summer and was avoiding contaminating my tanks but failed. These guys didn't show up until his tank was at my place for about a month, but he has had them for about a year. So I’m pretty confident their presences is not simply the result of overfeeding and a population boom. They are new inhabitants thriving on the same thing that my cherry shrimp are.
Also, I'm NOT against ALL microfauna either! I'll happily take some discreet scuds! I'm only against species that make my tank look so awful and dirty. There's nothing aesthetically appealing about a tank when its substrate and glass are covered with jumping bugs. They are obvious eyesores and take away from the enjoyment of watching the tank. I hate the way they make my tank look don't want them, but I'll happily catch some and send them your way Tom! After owning aquariums for over 15 years and never having to deal with this issue before, I see no reason not to fight it now before the situation really is hopeless.
 
seems unnecessarily cruel to me. I had seed shrimp in a fishless tank once and found them quite enjoyable to watch IMO. I don't see why the shrimp need to be killed just because you don't like the look of a harmless relative of theirs.

Yea, it's not something that I'm especially excited to do, and if it was my only tank I wouldn't do a thing about them! But I have 2 other fishless tanks (snail homes) and a diverse 46 gallon tank. Even if they only infest the fishless tanks, I dread the thought of all three fishless tanks infested with bugs.
 
I hate the way they make my tank look don't want them, but I'll happily catch some and send them your way Tom!

Yes please! Send the whole lot my way, I'd happily cover postage :)

Sounds like quite an infestation. Perhaps I'm not quite grasping the problem but I still reckon a bleach dip for the plants and picking out at least the adult shrimp has to be worth a go before resorting to the nuclear option!
 
I hate the way they make my tank look don't want them, but I'll happily catch some and send them your way Tom!

Yes please! Send the whole lot my way, I'd happily cover postage :)

Sounds like quite an infestation. Perhaps I'm not quite grasping the problem but I still reckon a bleach dip for the plants and picking out at least the adult shrimp has to be worth a go before resorting to the nuclear option!


Haha, even with paid postage I wouldn't curse you with this :p It's not the end of the world, and I know they are completely harmless, just hate the way they make the tanks look. In all honestly I do hate to lose the cherry shrimp, it took them a few months to get established, but they have turned out very successful reproductively. Is bleach safe enough for the plants? I've read 10% bleach solution @ 3 minutes as a dip but have also read mixed outcomes regarding plant survivability.
 
You're really going to intentionally kill your shrimp? Why can't you just catch the shrimp and take them out? Do these other bugs stick to them? I don't know anything about these weird creatures in your tank but killing off everything seems really extreme! Saving the plants would come second for me, shrimp saving would be the priority...but I am a shrimp lover, lol.
 
You're really going to intentionally kill your shrimp? Why can't you just catch the shrimp and take them out? Do these other bugs stick to them? I don't know anything about these weird creatures in your tank but killing off everything seems really extreme! Saving the plants would come second for me, shrimp saving would be the priority...but I am a shrimp lover, lol.

Oh trust me, I adore my shrimp!!! I have ghost shrimp in my big tank since the cherry's always get picked off in that one, but I really do love this little colony! I don't know if the bugs stick to them, the big ones at the bottom don't, but the smallest clear/white ones are nearly impossible to separate from everyone because the smallest ones nearly impossible to see with the naked eye.
I have been extremely strict about not contaminating my tanks with this bug and always feed/clean my friends tank last. I even use different nets and vacuums! So not only do I have no idea how they made it to my cherry tank, but I'm convinced these guys can easily hitch a ride to another body of water. Also, I have read that several species are parthenogenic (can reproduce asexually), so it may only take one to infest a tank. As much as I hate losing the colony, I have a good source and can get several more fairly cheap. As for the plants I only REALLY care about my drift wood and java moss. I cut and soaked the driftwood myself and I tied the moss down for a few months before it finally attached nicely on its own and started growing well. At least its a small colony and they are the only ones in there... kinda :/
 
I hate the way they make my tank look don't want them, but I'll happily catch some and send them your way Tom!

Yes please! Send the whole lot my way, I'd happily cover postage :)

Sounds like quite an infestation. Perhaps I'm not quite grasping the problem but I still reckon a bleach dip for the plants and picking out at least the adult shrimp has to be worth a go before resorting to the nuclear option!


Haha, even with paid postage I wouldn't curse you with this :p It's not the end of the world, and I know they are completely harmless, just hate the way they make the tanks look. In all honestly I do hate to lose the cherry shrimp, it took them a few months to get established, but they have turned out very successful reproductively. Is bleach safe enough for the plants? I've read 10% bleach solution @ 3 minutes as a dip but have also read mixed outcomes regarding plant survivability.
I would love to have some too. As I already said I have had seed shrimp before and found them very enjoyable. One persons curse is anothers blessing.

Bleach will kill your plants BTW.
 

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