Can I have come across a “special” strain of Cryptocaryon?

[nog_man2]

This is the third time in 3 years I treat my Fowlr and try to get rid of this nuisance...

After introducing a C.Collare and Naso Lituratos (that were quarantined in hyposalinity for 9 weeks at 1.009), I had a ich outbreak in my DT that I assumed to be "œich free".

I painfuly repeted the process of treating the DT with hyposalinity, by removing live rock and using a fluidized sand filter for biological filtration.

The problem is that 9 days after lowering salinity to 1.010, I still noticed ich on my collare, so I lowered salinity to 1.008 and 7 days after that, the dreaded white spots are still there!

My older fishes have no signs of infeccion, maybe do to gained immunity, but I can tell some faint trophonts on my new naso.

Could this be a special strain, resistant to hyposalinity?

 

[Gwynhidwy]

There are strains of Cryptocaryon irritans that can live in fresh water/very low salinity environments, so yes you could be seeing a hyposalinity tolerant strain. Though they are not the norm, this is one reason why I treat with Cupramine and not hyposalinity.

 

[LargeAngels]

Agree with above and are you sure it is ich and not velvet? Velvet is not affected by hypo. Which is yet another reason I don't do hypo and also use Cupramine.