Cam barr,
I'm sorry, but flukes is not my particular area of expertise. I know there are two main kinds -- those that reproduce on the fish and those that leave the fish to complete a cycle in the tank. As far as I know, 10 weeks fishless should rid the tank of the flukes. I'm just unsure if all flukes are 100% obligate parasites.?
Your link takes me to a product containing Praziquantel. This is not for external parasites. This is for internal parasites. I don't recommend you use it for the condition you've described.
I would not add any meds to the FW bath water. You'll see the flukes come off if the bath was successful. They will be on the bottom of the bath water.
From the FW dip, back into the tank. No acclimation. This is what I do:
Put RO/DI or distilled water in a large enough container (for which you have a lid) to perform your freshwater (FW) dip (bath). Mix it. Adjust temperature of the water to one or two degrees F above the water the fish will be going into (hopefully your quarantine tank).
Measure pH. Adjust pH to the same pH as the final water the fish is going into (hopefully your quarantine tank!). Adjust pH using sodium bicarbonate (also known as Baking Soda. I use Arm & Hammer in the small orangish box). Stop the pH adjustment just a little below your target (about 0.05 pH units low).
Now add 3-4 drops of a 2% (or 2.3%) Methylene Blue solution to each liter of water you have. When adding the Methylene Blue you can get the ââ"šÂ¬Ã‹Å“right sized dropââ"šÂ¬Ã¢"žÂ¢ by holding the dropper bottle exactly vertical. Donââ"šÂ¬Ã¢"žÂ¢t overdose.
Mix the water. Measure temperature again and adjust. Measure pH and tweak it to the right pH. FW bath is ready to use.
Put fish in gently; cover container. Watch fish closely. Initially the fish is excited, but should calm down in a couple of minutes when the Methylene Blue kicks in. Some fish try to jump out, so make sure the cover is on securely.
You want the fish to stay in as long as possible, but you donââ"šÂ¬Ã¢"žÂ¢t want it to die from this treatment! Some fish are good for 30+ minutes, others have a problem with 5 minutes. Try to go at least 20 minutes. As long as the fish is vertical and paddling about, it is okay. If it holds still, but still upright, it is still okay. Just watch it very closely. If it lays down on its side, prod it gently and see if it is just playing dead. (A few tangs like doing this). If it swims about after the gentle prodding, it is okay. If it still lays there, the FW bath is over.
Move the fish in a container of tank water to rinse it off of the FW dip in Methylene Blue. Then gently release the fish into its next home. Discard the FW dip water; discard the tank rinse dip water.
I donââ"šÂ¬Ã¢"žÂ¢t like using nets for the transfers. I use a plastic colander inside of a nearly identically sized container. The ââ"šÂ¬Ã‹Å“bathsââ"šÂ¬Ã¢"žÂ¢ and ââ"šÂ¬Ã‹Å“rinse dipââ"šÂ¬Ã¢"žÂ¢ is done just by raising up the fish inside the colander and putting the colander/fish into the next container and then finally, letting the colander sink in the QT for the fish to gently swim out of in its own time.
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When it comes time to move your fish back into the display, you will want to acclimate them IF the water parameters are different. If you match temperature, salinity, and pH between your display tank and the holding tank, acclimation is up to you. I still perform a short acclimation even if those three match perfectly.
Good luck! :rollface: