chefkeith wrote:jwyfk- you are having that creepy TDS issue also. Do you think it could of been the TDS issue in combination with the levamisole that upset your clown loaches? Or perhaps the HCL reacted to something in the water column? I guess this is why such treatments should always be done in a quarantine tank 1st, that way if there is an adverse reaction, then only one or a few fish are affected instead of the entire main tank.
I know you were saying that your TDS has ranged from around 200 to 850 ppm. How have you been dealing with this? Did you switch to RO water? Have you been doing smaller more frequent water changes?
You are absolutely right that you shouldn't trust anybody with your own fish. When I used Levamisole HCL I 1st tested it in a few small quarantine tanks, then after it passed my safety tests I dosed my main tanks with it.
Shari- maybe this is something you need to add to your article. That the levamisole should be tested in a quarantine tank 1st.
Also, fish definitely need to have steady water parameters during medicinal treatments. Kh, Gh, TDS, and pH levels need to be steady before, during, and after treatments. All the water changes that are required can make this a difficult task, especially in jwyfk's case.
The thought had definitely crossed my mind with regards to the elevated TDS combined with the high dosage of Levamisole causing a strange reaction. I did read somewhere that using this medication with a high PH is bad, but I think that is no longer the case.
There were 2 issues that I noticed with my fish before treatment: The strange white pit marks in my loaches, and the blister/ulcer on my Kubotai. One clown with an internal lump looked a little skinny, and a Yoyo was bloated and very skinny. Both of these fish were treated and cured previously in a quarantine tank using Jungle medicated fish food, which contains Levamisole. Because of this, and after reading about this medication, I decided to treat the entire tank as a preventative measure.
I just looked up my old post from October 30, and when I first got my TDS meter, the readings were tap-562 ppm, tank-601 ppm. The 852 ppm reading was given to me by the water company. The DEP and EPA is involved with the gas mine fracturing and brine water disposal problems, but I think the huge drop is due more to rain and snow dilution than any regulations imposed. Today, the tap water is 161 ppm, and 172 ppm in the tank. Oddly, though, the last time I checked my PH, it was still beyond the maximum of the freshwater test kit of 7.4, despite the TDS being below 200 ppm. Another odd thing that I have noticed since the TDS dropped so drastically is that when I do a water change, there is an abnormal amount of tiny bubbles present.
I didn't have much luck at Home Depot or Lowes with RO units, and the choices on Ebay are pretty overwhelming. Right now the TDS levels have been consistent, so I'm hoping the water situation has solved itself, unless we have drought conditions this Summer. I'll be moving in the Spring, and maybe have a better basement with a sink.
I know you advised against it,

but I treated the main tank with 2 rounds of PraziPro. A 4 oz bottle was only $13. I'm done. Purigen will be going back in, and I'm going to supplement it with Chemi-Pure. My fish have had enough drugs!
malia, I apologize for the overwhelming thread jack, lol. Shari's treatment is 3 rounds at a lower dosage. If your fish seem OK now, maybe it's better to stick with the 2 dose 2 round schedule? I had to estimate based on the amount of decorations and gravel in my tank, plus the volume of my sump. I think I used 6 grams. The second dose a few weeks later wasn't as dramatic for the fish, because I lowered the dose to 5 grams. As long as your fish aren't injuring themselves by crashing into things, and eat well, maybe you should continue with careful observation.