Velvet transmission in HT

[inigomontoya]

I have a slightly unusual question and think I would be ok but want to check with the experts. Without going too far into the background I have several fish in QT through an online order and was doing TTM with a 40g cube and 55g tank.
My display tank had velvet entrenched and I thought it was gone (drained, bleached, etc) with some fish in there happy for a month (they had been saved when velvet showed before and treated with cupramine). The velvet popped up and by the time I even saw symptoms killed a couple. I pulled and believe have saved my blueface angel.

He is currently in my 55g tank and, after a fw dip and chloroquine phosphate treatment, is looking symptom free and I am cautiously optimistic. Going to treat the DT with CP and go fallow for 8 weeks. This parasite has been persistent and while both may be overkill I want to be sure (will renew CP throughout to account for substrate/lr absortion),

My question is- with both HT and QT tanks (my 40 and 55) would it be ok to move some of the fish from the 40 (never made it into display and should be clean) into the 55 with the angel that had/may still have velvet as long as the CP is maintained?

My thought is that if the parasite hatches- that is when the CP kills it and it would not be able to infect the clean fish. The reason I wish to move some over is that they are cramped into the 40 and want to give them room to spread them out and the subsequent ammonia.

Thoughts welcomed.

 

[snorvich]

The fallow period for a tank with velvet would be six weeks. With no velvet hosts (fish) it will be eradicated with CP not necessasry. If the 55 gallon has had CP at therapeutic dosage for 4 weeks, moving unexposed, parasite clean fish to it should be fine.

 

[inigomontoya]

Thanks for the quick response, the HT has actually only had the "being treated" fish and CP in it for a few days. If the CP is consistently present would it be safe to move non-infected fish into that same tank (e.g. the CP would kill any tomites, if present, before infecting new fish)?

 

[snorvich]

Thanks for the quick response, the HT has actually only had the "being treated" fish and CP in it for a few days. If the CP is consistently present would it be safe to move non-infected fish into that same tank (e.g. the CP would kill any tomites, if present, before infecting new fish)?

Correct.

 

[inigomontoya]

Thanks

 

[inigomontoya]

I still have my fish in an HT and just came back in town from a trip. While gone I lost two fish in HT (which had been in there for about a month), my wife kept the fish and they showed the obvious signs of velvet. The HT has had CP at treatment levels the whole time (60 mg/g). I added another 1/2 tsp which should bump to appx 90mg/g last night and will do a full water change and bleach out that tank this evening.

My question is 1) how is velvet still active and 2) recommendations going forward. The obvious answer is that my fleabay CP is not as pure as advertised. This leaves me torn between using cupramine or a double dose of CP going forward (to account for the lesser strength of the CP). My DT is finishing its fallow period this week and I refuse to chance velvet getting back in there which makes me gravitate towards Cupramine. I have just had some bad experiences of fish reacting to it negatively in the past. I could also try a vet for pure CP?

 

[wooden_reefer]

Both ich and velvet are very curable so I am generally not concerned about transmission within the same QT. Just that any starting date has to be counted from the last one added.

I am concerned about bacterial infection within the same QT, so once a fish has been ID as having bacterial infection, fish that are not from the same tank will not be added.

I always intend to use UV in qt against bacterial infection.