lucas
Achatina achatina
Posts: 45
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Post by lucas on Oct 11, 2020 4:01:37 GMT
I was looking on this* website and it says under lymnaea peregra "Halstead's Golden Guide to Tropical Fish indicates this species should be avoided in aquaria because it produces a poison fatal to fish.". Is that true? I have one of these snails (only one because I intentionally bought it and it was the only one I could see in the store aquarium) and now I'm a little worried about that. My fish seem fine so far. I've had the snail since September 17 2020.
*http://mkohl1.net/Lymnaeidae.html
Notes: by pond snail I mean snails of the lymnaeidae family NOT bladder snails (physa acuta). Pond and bladder snail are used as synonyms in fishkeeping but they actually refer to very different snails that are only distantly related. Bladder snails are very common in aquariums but lymnaea peregra is rare.
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Post by Liguus on Oct 12, 2020 2:43:47 GMT
I think that info may be outdated or exaggerated.
I have seen people keep Lymnaea in their backyard ponds and everything was fine...that is more water surrounding them however, and I'm not sure if that book implies that they are toxic if ingested or allegedly secreting something into the water.
I have a Lymnaea stagnalis-only aquarium so I've got no direct experience unfortunately. I have though about adding a fish, but the aquarium is 10g and I didn't want to overload the filter...and I also have barely any interest in fish.
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Post by littlegoldsnail on Oct 17, 2020 16:13:02 GMT
I was looking on this* website and it says under lymnaea peregra "Halstead's Golden Guide to Tropical Fish indicates this species should be avoided in aquaria because it produces a poison fatal to fish.". Is that true? I have one of these snails (only one because I intentionally bought it and it was the only one I could see in the store aquarium) and now I'm a little worried about that. My fish seem fine so far. I've had the snail since September 17 2020. *http://mkohl1.net/Lymnaeidae.html Notes: by pond snail I mean snails of the lymnaeidae family NOT bladder snails (physa acuta). Pond and bladder snail are used as synonyms in fishkeeping but they actually refer to very different snails that are only distantly related. Bladder snails are very common in aquariums but lymnaea peregra is rare. I went the website you linked to, and I don’t see anywhere it states that the snail is poisonous. It does however, state that it can carry parasites (such as Gill flukes, etc), but so can any wild caught snail. That is why you are always supposed to quarantine wild snails to make sure they don’t have parasites. If a snail is carrying parasites, then yes, it can make your fish sick. |
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Post by littlegoldsnail on Oct 17, 2020 16:19:40 GMT
I think that info may be outdated or exaggerated. I have seen people keep Lymnaea in their backyard ponds and everything was fine...that is more water surrounding them however, and I'm not sure if that book implies that they are toxic if ingested or allegedly secreting something into the water. I have a Lymnaea stagnalis-only aquarium so I've got no direct experience unfortunately. I have though about adding a fish, but the aquarium is 10g and I didn't want to overload the filter...and I also have barely any interest in fish. In a 10 gallon, you could keep a pair of honey gouramis or sparkling gouramis.  those are cool fish and have a light bio-load. I would recommend some live plants though. Even just the snails will benefit from plants. Some anubias and maybe some crypts, java ferns or hornwort would help keep the filter from getting overloaded. |
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Post by Liguus on Oct 17, 2020 19:51:54 GMT
I think that info may be outdated or exaggerated. I have seen people keep Lymnaea in their backyard ponds and everything was fine...that is more water surrounding them however, and I'm not sure if that book implies that they are toxic if ingested or allegedly secreting something into the water. I have a Lymnaea stagnalis-only aquarium so I've got no direct experience unfortunately. I have though about adding a fish, but the aquarium is 10g and I didn't want to overload the filter...and I also have barely any interest in fish. In a 10 gallon, you could keep a pair of honey gouramis or sparkling gouramis. those are cool fish and have a light bio-load. I would recommend some live plants though. Even just the snails will benefit from plants. Some anubias and maybe some crypts, java ferns or hornwort would help keep the filter from getting overloaded. I have the aquarium a bit overloaded already with water hyacinth. I was just doing aquatic grass initially for the aesthetic, but ultimately it has ended up being a "swamp" in the interest of bio-filtration. |
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Post by littlegoldsnail on Oct 18, 2020 0:23:16 GMT
In a 10 gallon, you could keep a pair of honey gouramis or sparkling gouramis. those are cool fish and have a light bio-load. I would recommend some live plants though. Even just the snails will benefit from plants. Some anubias and maybe some crypts, java ferns or hornwort would help keep the filter from getting overloaded. I have the aquarium a bit overloaded already with water hyacinth. I was just doing aquatic grass initially for the aesthetic, but ultimately it has ended up being a "swamp" in the interest of bio-filtration. Ahh, I see. Yeah, overloaded planted tanks can get pretty messy when not done right. You’d probably have to start over with it to set it up for fish. |
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lucas
Achatina achatina
Posts: 45
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Post by lucas on Oct 18, 2020 4:31:05 GMT
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Post by littlegoldsnail on Oct 18, 2020 14:59:32 GMT
I extremely doubt that article is correct... I’ve never heard of any aquatic snail producing poison fatal to fish. Besides, how does it live in the wild fish? It’s more likely just a water quality issue when kept in aquariums. The article does not state any details on the type of poison and does not site any other articles about it, they just laid out a blanket statement, which not a very good way to source information. |
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lucas
Achatina achatina
Posts: 45
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Post by lucas on Nov 12, 2020 5:37:00 GMT
I continued looking for information about this. I finally found this. www.zobodat.at/pdf/Oesterreichs-Fischerei_18_0107-0117.pdf It is in German but I used google translate to read it. I haven't read all of it so far but here is a quote. It says that a toxic builds up in the snails under extreme conditions (e.g. Water evaporating) and is released when conditions become favourable again. That's good news because that won't happen in aquariums. It was translated by google translate so it sounds a little weird. "5. THE MUD SNAIL RADIX PEREGRA AS A FISHERIES FISHERY An interesting fact that was rarely current is that the mud snail Radix peregra poison fish under conditions that are probably due to delayed or inaccurate excretion. This causes can. It can't hurt to bring this to mind. If mud snails get into unfavorable living conditions, for example because a pond is drained and they have to endure a longer period of time through the gills and cause imbalance, cramps, and even happier-humidity in small fish during exposure to the sun, they suffer a kind of metabolic disorder - Most of all, a poison forms in the liver (presumably) of the snail, which is released intensively on return to normal conditions. The poison acts as a neurotoxin. Illumination and finally death invade. The chances of recovery for already damaged fish that are placed in fresh water are, however, very good. The harmful concentration of poison is reached with 40 snails (= approx. 10 g) per liter of water. Trout, pike, tench, etc. a. reacted positively in experiments to the poison, the eel not at all. With the previously known fish poisoning by Radix peregra, the situation was such that a larger number of snails came into the tanks together with the fish, or snails crowded together in a pond inlet and poisoned the incoming water." |
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those are cool fish and have a light bio-load. I would recommend some live plants though. Even just the snails will benefit from plants. Some anubias and maybe some crypts, java ferns or hornwort would help keep the filter from getting overloaded.