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Update, picked up some Azolla yesterday, which I got for free at World of Water where it was growing invasively in their outdoor troughs of pond plants. And it came with quite a load of Daphnia and other fast little guys, so it seems I don't need any seed stock after all, but thanks for the offer!

I'd never seen carboys before, despite searching Ebay extensively for large glass containers. It seems they're between 5 and 15 gallons. I saw a number of new ones online for about £30 for a 6 gallon container, and I'm not sure how many gallons the vintage style ones hold. Thanks for the tip...

This initial thread was a bit old anyway, with the owner moving to a new journal. So I think I'll be a squatter here with this discussion unless told to bugger off! ;) I actually tried such a one gallon eco-vessel for the first time in my junior high science class, but I didn't then have access...

I appreciate that the 'eco-vessels' would need a proportional flora density to support fauna. As invertebrates seem to have a lower metabolism compared to say fish, I thought a small few might nevertheless be well fed in a reasonable sized vessel given enough nutrients to start with. I was...

Hi Matt, thanks for the input. Were your vessels receiving direct sunlight? I'd perhaps prefer to put mine in a north facing window to avoid direct light and so to not cook the thing, but almost all my windows face east/west. I wasn't sure quite how much light would be best though and maybe some...

It seems we're going to conclude in disagreement on this topic. For while I believe I do see more where you're coming from now, I still think the comparison is in gross terms valid. And not to be argumentative, but I do happen to enjoy this topic as well as testing the philosophies of it. Your...

Sigh... okay, so why and how? Your opinion is that this doesn't work, but I'm finding the reasoning rather dubious. A specific thermodynamic property is a very different thing from a universal thing applicable to everything, and entropy in ecological terms refers just to the aspect that the...

I'd read that about the Ecospheres, but that seems to be as a result of such a limited food/biomass supply which they set those up with initially. I expect they have to do it that way to keep algae from quickly covering every surface and becoming unsightly, so you'd have to control for that in a...

Hi Tom, I noticed your post on plantedtank.net, which is quite an active forum as well. One of the links provided in that thread had been one for this store http://www.aquaculturestore.com/fwinverts.html which have different invertebrate species available, including a Freshwater Plankton mix...

Here is a similar thread which had some good feedback. http://www.plantedtank.net/forums/gener ... sible.html Do you have a source for the small invertebrates you'll be adding, such as daphnia and cyclops? I'm looking for some myself for a slightly similar tried, and just tried growing a sample...

Pelia moss and I believe Elodea should do okay, that's what I'm trying out in mine, until I get a spare heater.