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| Hoi ik weet niet goed waar ik het moet plaatsen, maar heb een hele goed thread gevonden op een engels talig forum over beestjes die je gratis en voor niets in je aquarium krijgt. Ik ga kijken of ik meer kan vinden en dan de boel vertalen als het nodig is. Groetjes Nancy http://www.microcosmos.nl/nmaingal.htm Nog een website in het nederlands!!! Here's some of the most common tiny creatures found from the aquariums. Copepods, Cyclops Male  Female  Size: 0,1 - 0,2 cm, 0.04 - 0.1 inches Copepods are small and funny looking one eyed crustaceans. They usually move around the tank glass and other surfaces, usually with one short leap at a time. Harmless, cute, there's lots of different coloured species. Water Fleas, Daphnia  Size: 0,1 - 0,5 cm, 0.04 - 1/4 inches Water fleas are usually used as fish food. They are tiny crustaceans and are easily recognized of their jerky vertical "swimming". They are completely harmless and really interesting creatures. I call them fat, sad reindeers (well, they look like it ). Seed Shrimp, Ostracoda   Size: 0,1 - 0,2 cm, 0.04 - 0.1 inches Seed shrimp are tiny seed shaped crustaceans. They are usually a bit bigger than Copepods. They move in a same fashion as Copepods, eating all kinds of nice things from the glass/plant/etc. surfaces and you can see them walking inside the substrate too. Sometimes they swim in open water looking like drunken bees. Here's a really young CRS baby looking at a seed shrimp. Really cute, harmless. Some species light up like fireflies when breeding or when scaring away predators. Clam Shrimp -   http://www.sacsplash.org/critters/clamshrimp.htm Freshwater Limpet - Acroloxus lacustris   Size: 0,1 - 0,8 cm ; 0.04 - 0.3 inches Since freshwater limpets, Acroloxus lacustris, are so small and also move really slowly, it might be hard to identify them as snails. They are small and can't do much damage to plants, but since they are small, it's impossible to find and remove eggs and the baby snails. Harmless. Something that looks a bit similar are Nerite eggs. They are singular, white, hard, round or oval shaped and about 1 - 2 mm in diameter. Tubifex  Size: 2 - 5 cm, 3/4 - 2 inches Red, yummy worms (used as fish food too) which live inside the substrate. If disturbed and dig up, they will form a ball, if left alone, they will gather pieces of sand/gravel around their body forming a sort of tube where they live in and they'll stick their head out of the substrate looking like red hairgrass. If there's lots of them, the substrate is too dirty and might be good idea to do something about it. Only a few Tubifex in the substrate isn't anything to worry about though. They are harmless. Nematodes  Size: 0,1 - 0,3 cm, max. 0.1 inches Nematodes are small, thin, white/transparent free-living roundworms and the "swim" moving themselves in a wave like pattern (well, forming an S shape). If disturbed, they will swim around wriggling briskly. You can find them from the substrate and they are the ones that might appear from the filter when you turn it on. These ones are harmless, but as with any other "pest", if there's too many of them, you are either overfeeding or just not keeping the tank clean enough of debris, decaying plant matter. Planaria, flatworms  Size: 0,3 - 1 cm, 0.1 - 3/8 inches Non-parasitic flatworms. Crossed-eyed grossness, just pure yucky! The only small creature I dislike (I get shivers down my spine even thinking about them). If you split it, it will regenerate and you will end up having 2 planaria. There seems to be several different colours in the common ones found in aquariums, transparent, white, brown and red. There's actually nothing really horrible about them, but they can bother small shrimp and snails and might eat fish/snail eggs. They love shrimp pellets, pieces of meat, dead fish/shrimp and they will also eat small live creatures if they can catch them. They move on the surfaces, even under the water surface and are most active by night. If disturbed, they will retract themselves (shorter and wider), let go and drop down to the bottom. Australian Leech  This is not a planaria with a spine and rudimentary legs. It is an Australian LEECH! Apparently the "spine" is it's developing young, and when they become free swimming, they attach itself to the mother and look like a billion tiny wiggly legs. Totally disgusting and mine was about a fourth of an inch long. Freshwater Bristle worm  They typically live deep in the substrate, or in the filter. The largest I have seen was nearly 4 inches long, it was munching on some mulm about 2 inches deep in the aquasoil, up against the glass. The smaller ones just look like red worm, and you have to look very close to see the bristles. I believe they are harmless, since they seem to be a detrivore. However, I have not touched one to see if they sting like some marine varieties. There have certainly been no dead fish with a row of stings up their side. IMO, this is the nastiest of the nasties you can find while working on your tank. Hydra  Size: 0,3 - 1,5 cm, 0.1 - 1/2 inches Hydra are beautiful, but a wee bit annoying creatures. They spend their life attached to surfaces (plants, glass, filter, decoration), they can move a bit, but usually don't have the need to do that. If disturbed, they will retract their tentacles and body to small buds. They catch small creatures (copepods, Daphnia etc.) with their tentacles which can sting, making it easier for them to haul the pray in to their mouth opening. They pose no threat to adult fish, shrimp or snails (might cause some irritation if they touch the Hydra), but newborn fish and shrimp fry are in danger. The species in the picture is Hydra viridissima and the green color comes from algae living inside the hydra. Bryozoa, moss animals  Size: individual creatures are only a few millimetres long, the colony can be tens of centimetres long Bryozoans are interesting colonial creatures. They look a bit like corals with the hard skeleton structure of the colony. The individual creatures, zooids, are inside their own small part of the colony and they eat small particles (phytoplankton, zooplankton) floating in the water by guiding them (and water) towards their mouth opening with the fan like tentacles. If disturbed, the zooids will retract their tentacles inside the colony walls. They are harmless and really interesting. Springtails, Collembola  Size: 0,1 - 0,3 cm, 0.04 - 0.1 inches Springtails are cool hexapods. They are used as live food for fish that eat from the surface, for example small Betta species and labyrinth fishes. You can find them more often from soil or leaf litter than from the water surface, but once in a while they will appear on the floating aquarium plants. If disturbed, they will spring to safety releasing their "spring" (furcula) that's normally bent under their body. They can jump surprisingly far (several centimeters). Harmless and cute. Stylaria Lacustris  So, many of us (including myself) have squiggly white worms that end up in the water column whenever we disturb the substrate. All of the info that I've come across links it to the Stylaria lacustris. A species of oligochaete that is commonly found in freshwater systems feeding on waste. The general consensus is that they're harmless to us and our fish. Mosquito larvae  Als deze uit het water komen heb je gelijk geen goede nachtrust meer.  Ik weet zelf niet hoe het met deze larven is, maar witte muggenlarven jagen op ander levend voer als die de pech hebben om in een bak samen te zitten. Ze lijken me iig niet echt lekker in het aquarium.Bloodworms  Text coming later Libelle larve  Deze zijn wel schadelijk omdat ze roven op kleine vissen en garnalen. Bron: http://www.plantedtank.ne...g-how-recognize-them.html | ||
