Discussion in 'Newbies to Garden Ponds' started by Loree, Aug 16, 2016.
By Snail Mail?
I purchased Japanese trapdoor snails a state away via mail and all survived - no experience with other snails : purchased from big auction site
This doesn't fit the snail category, but still relates to keeping the algae at bay and pond cleaning.
Has anyone added a Chinese High Finned shark to their pond? They get quite large (3 feet) and can survive cold temperatures, They eat algae and forage off the bottom. The do need a large pond and do well with other fish; they are not aggressive (despite the 'shark' part of their name). They are an expensive fish though.
http://aqualandpetsplus.com/Sharks, Banded Chinese.htm
I added the shark.... they are fragile but do well in big ponds.
I was getting a little excited to obtain some Japanese Trapdoor Snails for my newly remodeled pond, but quickly discovered they are non-native invasive species and on the Restricted list in Wisconsin. I imagine other states are similar?
USGS Fact sheet on them:
WI DNR aquatic invasive species list:
Did you notice that Koi carp are also on the Wisconsin DNR list?
Yep I see that, clumped in the "Common Carp" category. I'm now wondering what their true definition of Restricted really means. In googling "Japanese Trapdoor Snails", the first online petstore I looked at said unavailable to ship to Wisconsin. That was the only state listed. Garden centers and petstores sell Koi here.
One of the listings does include Koi in a special Restricted category (and look, there's the Chinese banded shark):
2. Nonnative viable fish species in the aquarium trade
a. Acipenser ruthenus (Sterlet)
b. Carassius auratus (Goldfish)
c. Cyprinus carpio (Koi carp)
d. Leuciscus idus (Ide)
e. Misgurnus anguillicaudatus (Weather loach)
f. Myxocyprinus asiaticus (Chinese hi-fin banded shark)
g. Rhodeus spp. (Bitterling)
Under the Business Resources tab, click on NR40 compliance for pet stores (PDF).
This basically is what other states mean when they speak of restricted species of fish.....that they not be released into the wild. If too many are, and they thrived, then that particular specie would be moved to the invasive list and any possession, without a permit, would be illegal.
Thank you! That Business Resources tab is the one I ignored, (I'm a consumer) but it's the one that contains the most relevant info for ponders. There are some good PDFs on there!
Even though the pet store fish are allowed in the WI aquarium trade, they make no exception for the Japanese Trapdoor Snail. The Mystery Snail or Apple Snail are listed as non-invasive snails that are OK to sell. In briefly reading about them, I see they've wreaked havoc on other parts of the world, oh the irony!)
So, grab some Melantho snails instead. A snail is a snail is a snail, in my opinion.
Nobody sits on the edge of their pond watching the snails.
It's like watching paint dry.
Thanks for the info about invasiveness issues. I have been wondering about people who have koi in their ponds in my area, specifically a very large pond next to a well known restaurant in Effingham. We all know that koi will reproduce when given the chance, and in a very large pond, I can only imagine how many thousands of eggs are laid. No clue how many of them survive, but when we get torrential downpours, and that pond overflows into the overflow pipe, where are some of those fry going?
I have wanted to put some "extra" koi into my farm pond, which is maybe only 6' deep at the deepest point, but know that when it overflows into the ditch, and runs into whatever stream, which might go into whatever river ... I don't want anyone coming back at me someday and accusing me of causing them to end up in other water sources.
I have, however, put water lilies in my farm pond, and OMG are they gorgeous! Guess they love the muddy bottom more than my pots with cat litter. LOL
The point is to have a snail in the pond that will give kids and their friends a "wow factor" upon spotting. The tiny half centimeter snails in the pond now are the hidden little guys, nobody sees them or knows they are there, nor cares if they see them. Some inch long giants will stand out and light up their faces!
Sheesh they may as well stop ponds from having fish at this rate.
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