metronidazole (flagyl) and inverts

er..md

Member
Anybody have any experience with this drug and corals/inverts? I have found some references that it is safe, some say safe for "some" inverts.
Anybody know of any species it isn't safe for?
thanks
 

beth

Administrator
Staff member
No it is not safe for display tanks, let alone a reef. No medication is. It kills off anaerobic bacteria.
 

er..md

Member
Most of the beneficial bacteria in an aquarium are not obligate anaerobes. Obligate anaerobes are those which convert nitrate to nitrogen and are found in areas like the centers of pieces of rock etc which have a very low oxygen level. It would be unlikely to reach these areas. Used in food it should not cause a high level in the water itself, but it is difficult to keep the food out of the shrimps mouth and the coral.
 

er..md

Member
Ich...it's a 24 gallon aquapod with a very large amount of rock...fish were all pre quaranteined and then the rock and coral were added...had no problems for 4 months then I put a couple of polyps in the tank I got at the LFS (everything else came for saltwaterfish.com)...shortly after noted a spot on the flame angel....went away...now spots everywhere. When I went into the LFS I noticed he had fishin one of compartments in his coral tank with...guess what ich, go figure that one out...
nevertheless, there is no way to remove the fish, the tank is in my waiting room. SO my options are limited, there is a large amoutn of coral all of which is doing very well, the fish all eat well and behave normally but in the last two days have developed a heavy infestation.
The other tank on my desk which got no coral from the lfs is doing fine
 

srfisher17

Active Member
Originally Posted by ER..MD
Anybody have any experience with this drug and corals/inverts? I have found some references that it is safe, some say safe for "some" inverts.
Anybody know of any species it isn't safe for?
thanks
Ich is a parasite, not a bacteria and metronidazole is an antibiotic, isn't it? I'm no biologist, but how would an antibiotic treat ich? I remember this stuff as a treatment for hole-in-the-head when I was breeding FW Discus years ago; but I think it was recommended as a dip treatment.
 

er..md

Member
It treats bacteria as well as many protozoans....not a biologis either, but part of my degree collection includes a BS and MS in micro....aquarium residents just aren't my usual patients
 

srfisher17

Active Member
Originally Posted by ER..MD
It treats bacteria as well as many protozoans....not a biologis either, but part of my degree collection includes a BS and MS in micro....aquarium residents just aren't my usual patients
So the same stuff that's prescribed for diverticulitis can also help ich? Man, what I learn on this site!!!
 

er..md

Member
I can't tell you for sure it works for ich, I am relying on what I read. and hoping the fish get better...but it does work for many protozoans so it is reasonable that it would...I just don't have any other options at the moment
 

al mc

Active Member
ERMD...I did use KICK ICH whose primary ingredient is Metro about 2 years ago when I had a bad case of ICH before i discovered this board and other treatment options. It does kill the free floating stage I believe so it can reduce your protozoan load. However, the ICH will continue to come back, as it did in my tank, because it is very difficult to completely break the life cycle with Metro alone. While I had no invert loss that I am aware of it did
cause me to have to make larger water changes to keep the ammonia and nitrites down. So, I am assuming that it did affect the 'good' bacteria somewhat.
I got tired of retreating so eventually I found this board and started proper QT and Hyposalinity.
 

er..md

Member
Thanks for the advice, one advantage of an aquapod is the ease of water changes...I hope that repeated treatments should eventually get it. Most of the facultative anaerobes that get killed reproduce relatively quickly and I can keep ahead of ammonia with the water changes....I must say the corals actually look better in the last few days although they have never looked bad. I have been treating by medicating the food, but the flame has stopped eating the medicated stuff and only eats the fresh mysis...so I will probably jsut does the whole tank...I never needed a QT....I QT'd them all before adding the coral....just never thought the LFS would keep infected fish in thier invert system....
 

srfisher17

Active Member
Originally Posted by ER..MD
Thanks for the advice, one advantage of an aquapod is the ease of water changes...I hope that repeated treatments should eventually get it. Most of the facultative anaerobes that get killed reproduce relatively quickly and I can keep ahead of ammonia with the water changes....I must say the corals actually look better in the last few days although they have never looked bad. I have been treating by medicating the food, but the flame has stopped eating the medicated stuff and only eats the fresh mysis...so I will probably jsut does the whole tank...I never needed a QT....I QT'd them all before adding the coral....just never thought the LFS would keep infected fish in thier invert system....
Be sure you let us know if you hit something that works. I've never seen anything, other than hypo or copper, that works. I have a friend in the hobby (25+yrs) who still says the same thing. She has a PHd in micro-biology and works for a University seafood aquaculture lab. She also thinks ich just might be getting some resistance to some treatments; because many big holding facilities have never really eradicated the bug, like the super-staph in the news. Just what we need. I know I go overboard, but I QT every fish; and QT most of them with copper, and formalin baths for fish that are very copper sensitive (like Flame Angels) or prone to brooklynella.
 
Top