None, Cories like to be on groups of 5+. 5 or more would be to many for a
2.5g. Do somthing like 6 neon tetras in it.
2.5g. Do somthing like 6 neon tetras in it.
What's a reasonable number of nano-fish in a 2.5 g?
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I personally don't suggest Dwarf cories in anything less than 10g. They prefer bigger groups and are more schooling than other cories IME. Some of them (C. hastatus especially) don't spend all their time on the bottom and they don't "sit around" like other larger cories. They need room to swim around and school and 5g is not big enough. 10g minimum for Dwarves. 
I've also heard the Micro rasboras needing a larger tank to swim around in. I've never kept them though, so can't say from experience.
I wouldn't put any fish in a 2.5g....just some small shrimp and even shrimp like room to roam around. Would you want to live in a closet?
I've also heard the Micro rasboras needing a larger tank to swim around in. I've never kept them though, so can't say from experience.
I wouldn't put any fish in a 2.5g....just some small shrimp and even shrimp like room to roam around.
Would you want to live in a closet?
The pygmy cories seem to be fine in the 5gal (I believe they're C. pygmaeus), but I wouldn't want to go smaller. The footprint of this tank is a tad bigger than the usual 5gal tank, I think; about 16"x10". They're definitely bottom-half-of-tank fish, with the majority of time on the bottom, but they certainly spend time in the lower middle levels; when they were in with other schooling fish, they'd occasionally pretend to be tetras or somethingI personally don't suggest Dwarf cories in anything less than 10g. They prefer bigger groups and are more schooling than other cories IME. Some of them (C. hastatus especially) don't spend all their time on the bottom and they don't "sit around" like other larger cories. They need room to swim around and school and 5g is not big enough. 10g minimum for Dwarves.
I've also heard the Micro rasboras needing a larger tank to swim around in. I've never kept them though, so can't say from experience.
They are quite active and fun to watch.The micro rasboras I had were very shy, and were usually hiding somewhere in the bottom back of the tank, but they were also in a 38gal community tank, and it might just have been too much activity for them. I did see them in all areas of the tank at one time or another, but they didn't seem all that active; they mostly 'hovered' when I saw them. I only had the one tank at the time, so moving them into a smaller tank for themselves wasn't something I thought of. I'd say a 5-10 gallon would have worked for them, along with a few more friends, but like I said, they may have been more active if they'd been in a small tank by themselves or with other more quiet fish. I'd love to try a 10 or so with them and maybe shrimp one day, but I suppose it'll have to wait til they're more common (and I have more time and money and space ;P). Super cute, though, and very striking markings.
i keep 12 (was 13 but one commited suicide yesterday) micro rasboras, 3 corydoras hastatus and one big fat neo. heteropoda (wild cherry) in a 8x8x8 cube. tank is heavily planted with a red sea nano hob filter and 10w pc light. setup has been like this with no deaths (until the jumper) for a year now. i dose pps pro daily and change 50% of the water once a month or when i remember. i have emersed growth m. umbrosium literally overflowing from the hob filter which makes for a great external filter to break down wastes. its a little overgrown, but as long as the fish are happy (these are healthier than the same fish in my larger planted tanks) i let it go with a trim every so often. YMMV though.
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Wow that's pretty well-stocked! I'm kind of aiming for that # number of fish. I keep getting mixed responses. So basically, I'll go by this standard as the maximum number of fish to be comfortable. Of course that's really well-stocked.i keep 12 (was 13 but one commited suicide yesterday) micro rasboras, 3 corydoras hastatus and one big fat neo. heteropoda (wild cherry) in a 8x8x8 cube. tank is heavily planted with a red sea nano hob filter and 10w pc light. setup has been like this with no deaths (until the jumper) for a year now. i dose pps pro daily and change 50% of the water once a month or when i remember. i have emersed growth m. umbrosium literally overflowing from the hob filter which makes for a great external filter to break down wastes. its a little overgrown, but as long as the fish are happy (these are healthier than the same fish in my larger planted tanks) i let it go with a trim every so often. YMMV though.
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