February 23, 2009
I am currently keeping a 65L tank (roughly 17 gallons I think?) with 9 male fancy guppies, 3 cories and 1 bristlenose catfish. I have had the tank for just over one month and all parameters are stable (Ammonia 0, Nitrites 0, Nitrates 0, pH 7.8) on last check two days ago. I was told by the LFS not to worry about testing the hardness of the water. The tank is moderately planted (wisteria, variegated rush, two anubias on driftwood).
The guppies are very active and all of them are feeding well, however as I am new to this hobby I wanted to check normal behaviour - I have searched a few sites but cannot seem to find a lot of information on this; only articles on abnormal behaviour.
I have two guppies that are exhibiting this behaviour. They will swim at a 'regular' pace from the surface to the bottom of the tank near an edge (vertically), then very very rapidly swim vertically up to the surface again. They are not being chased, but sometimes another guppy or two will follow them up and down, without the rapid vertical ascent. I have noticed that one of these guppies exhibiting the vertical swimming behaviour will also do something similar with the outflow of the filter pipe - he will swim with the water flow near the surface, then turn around and swim rapidly back against the water flow towards it until he is underneath it, in a still section of water.
Is all this rapid swimming normal? Are they just playing or should I be worried about this?
Thanks in advance for all the help,
Edit: Forgot to add that I'm doing about a 10L water change once a week (about a 15% change).
June 13, 2011
April 30, 2008
hi, one reason could be that your tank isnt fully mature yet - if you are showing 0 for ammonia, nitrate and nitrate then something isnt right in your tank as you should be showing one of these for the cycle to start - it may be that your guppies are experiencing 'new tank syndrome' - peaks of nitrite until the filter cycles
February 23, 2009
Thanks for the replies Matt and ndc, and for the welcome =)
I had the tank cycling for about a week before I added 3 guppies and two wisteria plants. I have gradually built up the fish in there over the last 4 weeks. I had a little nitrate spike 10 days ago but it fell back down when I did a water change.
They look healthy in general and are swimming around everywhere, always active, feeding a lot (eating all my sinking wafers for the cories).
I'll just keep an eye on them.
Hey Maz /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />
How much flow do you have in there? Is it an external filter? If you've got the make/model of your filter that'd be handy. Do any of the other fishes seem to be struggling against the current at all?
Does indeed sound pretty peculiar - I've seen this kind of thing before and generally it tends to be one of two things, but if they're feeding happily, I can't imagine it being anything other than a flow problem.
September 7, 2008
February 23, 2009
Wow, thanks for all the replies everyone! /happy.gif" style="vertical-align:middle" emoid="^_^" border="0" alt="happy.gif" />
I think I was a little bit newb and let the LFS talk me into a filter that I probably didn't need to spend so much money on. /dry.gif" style="vertical-align:middle" emoid="<_ <" border="0" alt="dry.gif">
It's an external canister filter (Eheim 2213), and I haven't restricted the flow on the water through the pipes. The water coming out of the filter hits the side of the tank about 1cm above the water level - I was trying to give some surface agitation without using airstones (or whatever else is used).
None of the other guppies are doing this, only these two, and they were quite recent purchases from the same supplier (1 bought one week ago, the other one bought 3 weeks ago).
What would it be if they weren't feeding happily, Dunc?
Thanks again everyone!
That filter does around 390 litres per hour.. so it's basically circulating your aquarium's volume of water 5 times per hour. That's totally acceptable - the recommended value for most tropical tanks is about 4 times per hour, so it's maybe a little bit quick, but I can't imagine it being so rapid that your Guppies are struggling in the current.
It sounds like they're just enjoying the current in your tank /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" /> Did you say they seem to swim near where your filter output is? If so, I'm fairly sure it's just that and hopefully nothing to worry about.
Usually if you see fishes with abnormal swimming activities that aren't feeding, it's indicative of some kind of illness - parasites, internal bacterial infections, etc. I'm fairly sure that isn't the case with your fish, but either way, keep us updated. Even better, if you can, get a video of it (you can host with http://www.photobucket.com).
June 1, 2008
I think that osmosis has a small bearing on the behaviour of your guppies? Many guppies, in particular those bred in Asia, are bred in slightly salted water and, sometimes, when finding themselves in pure fresh water suffer as a consequence.
This was a great problem when the first tank-bred Red-tailed black sharks and Clown loaches appeared in the hobby and they would swim into bubbles in the same fashion as you mention for your guppies.
If you did not have Corydoras in your tank I would suggest adding a little tonic salt, as this would do no harm to the Ancistrus. Perhaps a fellow member can tell us how Corydoras react to ts.?
June 20, 2008
Hi Maz, Welcome to fish fanatics inc /wink.gif" style="vertical-align:middle" emoid=";)" border="0" alt="wink.gif" />
My corydoras cats do this all the time. It might sound silly , but I think they see their own reflection or something, as they seem to be trying to get to the other side ! I have never discovered a reason why one fish or another starts this behavior, but it happens. /wacko.gif" style="vertical-align:middle" emoid=":wacko:" border="0" alt="wacko.gif" />
February 23, 2009
Oh phew, thanks for all the thoughts on what could possibly be causing this odd swimming behaviour - being my first tropical freshwater tank I was a bit panicky (even though my guppies weren't all that expensive; but I really liked the ones I had picked) and I didn't want anything to go wrong after I had spent weeks researching and carefully thinking about what to put in the tank! If I sit still enough my cories will come out and sometimes sort of do it (the fast swimming behaviour) as well, but mostly they just hide from me. /sad.gif" style="vertical-align:middle" emoid=":(" border="0" alt="sad.gif" />
I will try to get a video of the guppies doing their thing.
Dunc - only one of them swims really fast towards the filter output, the rest of them sort of just amble around near it.
One thing I just thought of - when I started my tank I used the fishless cycling method, and was recommended a product called Lysofoss to kickstart the bacteria. I cleaned out my filter the other week and I noticed that the bacterium were growing on the noodles in the filter, so that was great. But then I looked closely at the pipe coming out of the filter into the tank, and it looks like the bacteria have colonised all along on the inside of the pipe too! Is this bad? Can you have TOO much bacteria? /unsure.gif" style="vertical-align:middle" emoid=":unsure:" border="0" alt="unsure.gif" />
February 23, 2009
If it's just one fish.. then that's really odd /ohmy.gif" style="vertical-align:middle" emoid=":o" border="0" alt="ohmy.gif" /> I guess you'll just have to wait it out a bit Maz, see what happens.
Well, we're a relatively (< -- key word /biggrin.gif" style="vertical-align:middle" emoid=":D" border="0" alt="biggrin.gif" />) new website. I think we've had most of our content online for around 2 years now but there are a lot of other sites - although with significantly less information on the majority of them; though our forums are just getting off the ground - that have been around for longer than us and as such have a better Google ranking.
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