thread journal of using Ich Shield in DT
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Mishri
Active member
Yep, that is an interesting thought. I wonder if the 21 Day recommendation is so all the swimmers and attached are dead then move them to new tank? I've been reading some more on CP and found someone recommend weekly re-application @10ppm for 1 month in a display tank. I've been trying to find some studies on effects on the tomont stage but have been coming up empty... If people are succesful with 3-4 weeks, I would have to assume the tomonts are being killed.
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Mishri
Active member
Ah.. did some digging, most recommend 28 days because tomont stage lasts between 3-28 days, when the water temp is between 76-78. CP kills the trophant and tomites. so you are just waiting for that.
I'm certain that 72 day thing is not something we should expect to ever see from what I've read of people citing the 72 day source, it was kept in the 40's.. At normal aquarium temps other studies found no longer than 28 days, and others found 5-12 days being average... this is where the original 6 week fallow period came from.
I'm certain that 72 day thing is not something we should expect to ever see from what I've read of people citing the 72 day source, it was kept in the 40's.. At normal aquarium temps other studies found no longer than 28 days, and others found 5-12 days being average... this is where the original 6 week fallow period came from.
The difficulty is that there is consistent data - so I have read and seen repeated many times - that 72 days is the required fallow period. Which indicates that the Tomont stage (cyst) can last 70 days. So for the emerging tomites to die from lack of a host you would need another couple of days.
The only way CP would work within less than that time is IF it kills encysted tomites.
The only way CP would work within less than that time is IF it kills encysted tomites.
Mishri
Active member
yeah, they are citing a study from Colorni and Burgess 1997, detailed in this paper: Cryptocaryon irritans Brown 1951, the cause of ‘white spot disease’ in marine fish: an update
And part of that study included seeing how low of a temp they could be kept and still be viable, during that portion of the study, they observed 72 days at 7 degrees C. (44F). It certainly doesn't hurt to give things more time. But people are also wasting a lot of time and potentially stressing fish for longer than necessary. So.. unless you know of someone who actually read the paper, usually you'll just find someone saying 72 days and listing that paper.
And part of that study included seeing how low of a temp they could be kept and still be viable, during that portion of the study, they observed 72 days at 7 degrees C. (44F). It certainly doesn't hurt to give things more time. But people are also wasting a lot of time and potentially stressing fish for longer than necessary. So.. unless you know of someone who actually read the paper, usually you'll just find someone saying 72 days and listing that paper.
This is a pretty comprehensive review of the current science of Cryptocaryon. No cause for optimism at all. Essentially once it's in the DT it may always be there. I'm so bummed. Going to stay the course of 12 weeks and hope...
http://edis.ifas.ufl.edu/fa164
http://edis.ifas.ufl.edu/fa164
Dmorty217
Saltwater Addict
You should be good to go providing you don't introduce it again into your tank somehow
