Some northern Europe saltwater snails (and perhaps a slug)

[Donya]

Looks great!! The extra lighting will definitely help to produce more algae. How are the lights as far as heat production? I have never had much experience with LEDs, just fluorescents and metal halide.

[Pollux]

that blue snail in the photo is nice

[Blötdjur]

Looks great!! The extra lighting will definitely help to produce more algae. How are the lights as far as heat production? I have never had much experience with LEDs, just fluorescents and metal halide.

Thanks!

Here is some data on my lighting:

LED (Light Emitting Diode): 7.2 W
Flourescent: 7 W

Model of two outer LED reflector lamps:
12 V, 1.8 W, 20 LED:s, for "MR 16" socket
Luminous intensity (link): 13 000 mcd
Colour temperature: 8 000 - 9 000 K
Heat: Very little, you can feel a little heat when touching the lamp.
Expected time of good lighting: Not given, but hopefully some years.
Cost: 79 Swedish Crowns (Kronor ) (12.5947 US $) (Clas Ohlson)

Model of two inner LED reflector lamps:
12 V, 1.8 W, 24 LED:s, for "GX 5.3" socket (maybe same as above )
Illuminance (link): 250 lux (How much a square meter is illuminated, but at what distance?)
Colour temperature: Not given, but a lot higher than the one above's, possibly about 10 000 K.
Heat: Possibly double or more the one above's, but still very little for a lamp producing this much light.
Expected time of good lighting: Not given, but hopefully some years.
Cost: 89 Swedish Crowns, 79 if you buy two (Kjell & Company)

Model of compact flourecent tube (mounted with reflector):
12 V, 7 W
Colour temperature: 6 000 K.
Heat: Some.

It is also possible to buy more low level LED components (no socket connector, no reflector) and build your own.

[Blötdjur]

that blue snail in the photo is nice

It is

The shell isn't blue in reality though, but the foot often looks blue.

[Blötdjur]

The Common Periwinkles have no time to rest, too much algae

The newly discovered small snail seems to be a Common Periwinkle! I really wonder if the whole reproduction took place in this aquarium...

[Donya]

Thanks for the detailed info! Those sound like good lights, probably a much better alternative to a lot of the more common lighting systems for tanks in the pico size range. I had quite a hard time fiding lighting that didn't overheat my 1-gallon tank; I probably should have looked into the type of lights you've got.

[Blötdjur]

Thanks for the detailed info! Those sound like good lights, probably a much better alternative to a lot of the more common lighting systems for tanks in the pico size range. I had quite a hard time fiding lighting that didn't overheat my 1-gallon tank; I probably should have looked into the type of lights you've got.

No problem!

Is that tank still running? Of course I'm interested in seeing it

[Donya]

Yep, it's still going! Although it's strayed rather far from what I intended it to be, it may well be the most successful given how many different species have been spawning in it over the last few months. I've got a couple pics:




Unfortunately I couldn't keep it as a SOWLR, since the tank has large 10-12" bristleworms that begin harassing my snails. So, the tank now has a breeding pair of Clibanarius ransoni hermits instead (a HOWLR tank perhaps? Well, it's the same sort of setup anyway LOL). Fortunately, the hermits are able to handle the large worms without trouble. There are some other bizzare things that have found their way into that tank, including a small population of unidentified, extreemly small jellyfish (they grow to ~3-4mm as adults).

[Blötdjur]

Wow, nice tank!

Is the lighting flourescent, and what wattage is it?

Those jellyfish sound very cool! There is a small (but bigger) freshwater jellyfish that I'm impressed with. It has occured in Sweden. I have also seen pictures of small saltwater jellyfishes on a board, perhaps here: http://www.reefcentral.com/forums/forumdisplay.php?forumid=427

[Pollux]

that looks great donya, how big is it? do you have any photos of the jellyfish?

[Donya]

that looks great donya, how big is it? do you have any photos of the jellyfish?

The tank is just a 1g fish bowl. Keep in mind that the jellies are in the millimeter range and mostly clear...and the tank glass is pretty thick and not high quality, so it's not a great subject for my camera lol. This is the best I've been able to get:

Is the lighting flourescent, and what wattage is it?

Yep, it's a regular 12W fluorescent; it's a circular bulb that's about the diameter of the bowl opening. The heat output is not as bad as the fluorescents on my other tanks, but even so it tends to keep the tank ~2 degrees Fahrenheit warmer than the surrounding air.

Those jellyfish sound very cool! There is a small (but bigger) freshwater jellyfish that I'm impressed with. It has occured in Sweden.

I have heard of those and wanted to see some for a long time. Thanks for the forum link - will check that out (it says search is disabled right now but I'll try again later tonight).

[Blötdjur]

Here are a couple of pages on the forum:
http://www.reefcentral.com/forums/showthread.php?threadid=1218069
http://www.reefcentral.com/forums/showthread.php?threadid=1235990

Here are a couple of other pages:
http://www.wetwebmedia.com/jellyidfaqs.htm
http://www.ronshimek.com/Animal%20Groups%203%20Cnidarians.htm

Here is a nice movie of the "parachute behaviour" of the freshwater jellyfish:
http://www.naturhistoriskariksmuseet.org/download/18.6de83d8a10d366f39918000436/manet-landining.avi

[Pollux]

cool video.

[Blötdjur]

Nice jellyfish there Do you think the medusas are grown up enough to reproduce?

[jonfr]

That small white thing there, I also have it in my tank.
I didn't have any idea what it was. At the moment I don't see any, but that is not surprising.