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Re: Aquatic Plants Digest V4 #1475

   I too have had those tiny hopping critters in my aquariums Ithey are about the size of a pinhead).  They seem to be more apparent if there are floating plants in the tank.  I have found them in my tanks on and off for years without any problems.  I think my threadfin rainbows my even eat them.  I find that I often get rid of quite a few of them when I use a net to skim of duckweed.  A brine shrimp net would capture a lot of them.  Good luck.

Sherry Quinn

Date: Mon, 17 Dec 2001 09:36:52 -0000
From: "Henshaw, Tim" <tim.henshaw at bolton_gov.uk>
Subject: RE: Unidentified critters


I think that you are seeing springtails on the surface of your tank. They
will not harm your fish. I think they feed on either surplus food or the
bacteria and algae that grows at the surface of the tank. I am not familiar
with any method of removing them. In the past we have had population
outbreaks in some of our display tanks, usually in the filter bed(we have
external trickle filtration, and they were an indication the filter needed
to be cleaned. It may well be that some fish (surface feeders) will take
them, but I cannot recommend any at present. may be someone else on the list
can suggest something.

Tim Henshaw
Bolton Museum Aquarium

Date: Mon, 17 Dec 2001 08:59:37 +0100
From: "Davy Cleys" <davy.cleys at skynet_be>
Subject: Unidentified critters

Hi all,

A couple of days ago, I noticed something unusual on the water surface of my
240 l tank. There seem to be some small critters that are jumping around at
the surface. They have a rather pinkish to orange color. As soon as you
approach them, they jump away. A few days ago, there were only a few of
these unidentifieds, but now, their number seems to have increased. They all
like to sit on top of the filter spray bar which comes out of the water a

Does anyone know what these critters are and how I can get rid of them?