Harlaquin Rasbora Hiding Behind Filter
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Harlaquin Rasbora Hiding Behind Filter

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Harlaquin Rasbora Hiding Behind Filter
Old 08-12-2011, 06:35 PM   #1
 
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Question Harlaquin Rasbora Hiding Behind Filter

Hey everyone! Recently I have noticed that one of my Harlequin Rasbora fish tends to hide behind the filter. He will be an active member of his schoal for most of the day (when I'm looking at the tank) but then seems to hide behind the filter for about 20-30 minutes... Is this normal? Any help is appreciated

EDIT- Some more info is:

There are 3 other Harlequin Rasbora fish and 4 Zebra Danio fish.
Tank temperature is 23•C/74•F.
The tank heater is on the other side of tank to the filter.
There is a hiding spot in the tank created by some artificial plants.

Last edited by Reece; 08-12-2011 at 06:43 PM.. Reason: Extra info that could help
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Old 08-13-2011, 05:41 PM   #2
 
H-Rasbora's ... from literature I've read do best in a shoal of 6- 8. Adding a couple of more may change it's behavior.
However since you mention it is active with the other fish ... Is it eating? Is it's color good? Is it swimming fine? Does it generally look healthy? If all those are yes ... then there may not be too much to worry about.
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Old 08-13-2011, 05:46 PM   #3
 
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Oh ok...! Thanks. I might as well ask, two of my zebra Danio ish are being aggressive with eachother. One has stopped but the other still seems to boss the other plus the other 2! Any ideas what this is about. And by the way the H-Rasbora is eating and swimming an is healthy too. No loss of colour so there's no indication of stress either. Perhaps he likes to have some peace from the others haha
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Old 08-13-2011, 05:59 PM   #4
 
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Oh ok...! Thanks. I might as well ask, two of my zebra Danio ish are being aggressive with eachother. One has stopped but the other still seems to boss the other plus the other 2! Any ideas what this is about. And by the way the H-Rasbora is eating and swimming an is healthy too. No loss of colour so there's no indication of stress either. Perhaps he likes to have some peace from the others haha
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Not too unusual to have one fish from a shoal be off by itself. A couple of my Barbs do the same thing ... are active with the others and then take off on their own.

As for your Zebra D ... I've read that about them too ... with them you may try getting two more to increase their shoal to spread out some of that aggression. They are very active fish so it's not unusual to have two go at it .. two of my Zebra D (the larger 2) kind of do the same thing.
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Old 08-13-2011, 06:39 PM   #5
 
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How big is your tank? Zebra danios need to be kept in larger groups of six or more. They are also very active swimmers which I am sure that you have already noticed and need to have a tank at least 24" long, which would be the size of a 20 gallon. With them being kept in a smaller number, and if the tank is not big enough this can and will lead to stress to the fish, which we usually see in displays of aggression as one of the signs of stress.
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Old 08-13-2011, 07:01 PM   #6
 
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Ah. That could be my problem! I have a 10 gallon tank
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Old 08-13-2011, 07:16 PM   #7
 
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Both of the fish that you have in this tank right now a shoaling fish and require having groups of 6 or more along with that both fish require a tank of at least 24". At this point I would not add any more to the group, the current tank would not be large enough to have a group of 6 of each fish. One of the things that you might considering is upgrading to a 20 gallon. Depending on the type of equipement that you have it may be able to be used on the 20. If you did than you would be able to keep the fish in a larger group as they require. If you have not already found the profiles for fish here, I would suggest that you check them out. The link can be found at the top of the page second tab on the left or you can click on the shaded name Harlequin Rasbora and Zebra Danio. This is a great tool in being able to learn more about your fish and their requirements, and also when looking at getting other fish.
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Old 08-13-2011, 07:28 PM   #8
 
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I can't upgrade to a 20. No room and I only just got it last week. Would it be worth adding one more fish to each type of fish? So one more harlequin Rasbora and one more zebra Danio? Not major change and it still leaves each fish with a gallon of room. Or is that too little?

By the way I love your angel fish!!
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Old 08-13-2011, 07:37 PM   #9
 
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Quote:
Originally Posted by Reece View Post
I can't upgrade to a 20. No room and I only just got it last week. Would it be worth adding one more fish to each type of fish? So one more harlequin Rasbora and one more zebra Danio? Not major change and it still leaves each fish with a gallon of room. Or is that too little?

By the way I love your angel fish!!
You should be able to add one more of each, using aqadvisor it places you at almost max on stocking level, although they are not taking into account the min tank requirement suggested for these fish. By adding one more of each it should help the fish feel more comfortable being in a larger group.

Thanks he is one of my favorites, full of personality and thinks that he, although could be a she not sure yet, thinks he is king of the tank.
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Old 08-13-2011, 07:45 PM   #10
 
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Ok... Thank you so much for the advice. I will be able to get the extra fish this Wednesday! I will keep you posted on how re fish respond and wether it is positive. As for the original part of this, I think that he is hiding behind the filter to get away from the others, that is all I can seem to think of! Hopefully they will accept the new fish in, I will also try my hardest to get a female zebra Danio and not male, just so that the 2 females aren't overpowered by the males...

One more thing, is it ok to do a half-tank water change every week, as I personally think that the more water you change the better (max being half), is there anything wrong with doing half every week?
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