Black Molly Quarantine

asw338

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Hi. I have 3 black mollies converted into saltwater environment for 2.5 months. I'm curious if these same mollies can be converted into freshwater and retest in saltwater again in other tank? Are they still have effectiveness to test any velvet and ich present in the tank? If this can be done, how long the mollies should be in freshwater and retest? Thanks in advance.
 

Humblefish

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Hi. I have 3 black mollies converted into saltwater environment for 2.5 months. I'm curious if these same mollies can be converted into freshwater and retest in saltwater again in other tank? Are they still have effectiveness to test any velvet and ich present in the tank? If this can be done, how long the mollies should be in freshwater and retest? Thanks in advance.
Here's the thing: Once black mollies have been exposed to Ich, velvet, etc. in a SW environment their immune system is now familiar with SW pathogens. So IMO, these mollies would no longer be suitable to be used as "canary fish" because they might have developed resistance to said pathogens. Such fish would be best converted back to freshwater permanently so they can live out their lives in that environment.

However, if your black mollies have never been exposed to SW diseases you can convert them back to FW and then back to SW on as-needed basis. :) In nature, green mollies mostly live in brackish environments with varying salinity.
 

asw338

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Thank you, Humblefish! These mollies never been exposed to SW diseases except white stringing poops. I treated them medicated food soaked for two weeks when I first got them. They are only fishes in my DT tank and I have plan convert them to freshwater retest in my coral 40B quarantine tank. :)
 

mattzang

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i matriculated my way to the lfs earlier and found a tank full of black mollys, so i asked what salinity they keep them at and they didn't know, but assured me they top off with saltwater so.. some?

what's the go to way to acclimate them to full salt via dripping? just several hours of drip or 30 min and toss them in?
 

Humblefish

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i matriculated my way to the lfs earlier and found a tank full of black mollys, so i asked what salinity they keep them at and they didn't know, but assured me they top off with saltwater so.. some?

what's the go to way to acclimate them to full salt via dripping? just several hours of drip or 30 min and toss them in?
I would drip acclimate them over several hours. Be sure to provide aeration and heat for them being in the bucket for that long.

P. S. If they were mixed in with other SW fish and/or salinity is too high, they may have already been exposed to SW pathogens. Which would render them unsuitable to use as test fish and possibly they are even harboring SW diseases themselves. :eek: In short, I would check their salinity ASAP.
 

mattzang

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blasphemy!

idk they were in their "brackish" system and i saw monos and those goofy brackish puffers. i wanted to get them as test fish, but apparently they're also quite useful to have as they eat detritus and algae and pop out some free fish food constantly.
 

Humblefish

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blasphemy!

idk they were in their "brackish" system and i saw monos and those goofy brackish puffers. i wanted to get them as test fish, but apparently they're also quite useful to have as they eat detritus and algae and pop out some free fish food constantly.
Depending upon salinity of the bag water, just keep in mind that Velvet can survive just fine in 1.009 & above. :eek:
 

MamaP

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Hi, again, @Humblefish ! I need to pick your brain once again.

My mollies have been in my Invert QT for 43 days today. I'm probably being paranoid, since I know it's getting close to time to put the inverts in my DT (45 days) and I have a bit of PTSD from my ich experience. 😳

I've been spending a lot of time watching thru my Flipper and watching for crazy behavior the last week or so. Could be "normal" molly behavior, but I've seen them darting around some, "gulping" at the top of the water, and appearing to sort of bump up against the glass with their bodies. They are not scratching on the fake coral I have in there for the inverts, nor are they swimming into the powerhead flow, but I have seen them hanging out in a corner.

Like I said, I'm probably being paranoid, but I saw a whitish patch and did a FW dip, thinking about flukes. Only had 1 "thing" in the bottom after and not sure if it's a fluke (see pic and please excuse the spots on the magnifying glass and all the dog hair on the rug beneath).
1579454019058709429981913287609.jpg

I will say that these mollies have "freckles" of silver and gold, so it's hard to tell for sure if there's even anything there, but here's pics of the "spots".
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So what do you think? Am I being paranoid??
 

RaReefer

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I have 1 molly and some SW fish in QT. Can I observe the fish for 2 weeks then treat with copper for 2 weeks just in case something survives?
 

Humblefish

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I have 1 molly and some SW fish in QT. Can I observe the fish for 2 weeks then treat with copper for 2 weeks just in case something survives?
You can, but I would replace the molly every time you QT because it's immune system might be inadvertently introduced to Ich/velvet as you are raising the copper level.
 

Kyl

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How are these guys with GHA? Debating adding some to my invert frag tank to see if anything is in there still, and it does have some gha that has been coming back since taking the tang out of there.
 

Kups

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How are these guys with GHA? Debating adding some to my invert frag tank to see if anything is in there still, and it does have some gha that has been coming back since taking the tang out of there.
I'd like to know this as well as I have the exact same idea.
 

Humblefish

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How are these guys with GHA? Debating adding some to my invert frag tank to see if anything is in there still, and it does have some gha that has been coming back since taking the tang out of there.
From what I've heard, sometimes they eat it sometimes they don't. Mine are always picking at the sand & rocks.
 

GoldeneyeRet

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I am getting ready to molly test a tank. I have never kept fw fish so I'm not sure what to use for source water before I start dripping saltwater. Dechlorinated tapwater? RODI? Will biospira still work to start a biofilter?
 

Humblefish

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I am getting ready to molly test a tank. I have never kept fw fish so I'm not sure what to use for source water before I start dripping saltwater. Dechlorinated tapwater? RODI? Will biospira still work to start a biofilter?
Dechlorinated tap in a bucket. Dosing Prime every 24 hours will keep ammonia under control until they are fully acclimated.
 
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