First, thanks to all that visited this thread and had encouraging comments. And for the rest that didn’t visit and weren’t supportive <pbbbbbfft!>
Bascially, this tank was an experiment on sunlighting in an everyday application/situation. I know sunlight works in a greenhouse (e.g. Tropicorium or Seacrop), skylighting/sola-tubes, and natural setting (i.e. those reef-things/places near the equator) but I wasn’t sure how it’d stand up in a plain ol’ regular tank setting plopped down next to a window like a potted plant.
I was definitely concerned how the corals would color up/down with the sunlight but I think I’ve been pleasantly surprised at the coloration and growth. The usual problems of nanos/picos affected the tank (i.e. temperature, evaporation, alleopathy, etc.) but by and large I think it was a success. During the contest the main problems I had were temperature and alleopathic issues from a sinularia but otherwise things seemed to get along.
Long-term for sps and stonys I'll have to investigate more but not sure if I'll bother since those corals really don't interest me. So far though, the stonys seemed very happy with the lighting levels (although we
are entering spring/summer, not sure if winter season would sufficient).
Unlike some of the other contestants’ view of "easier maintenance with such a small tank", this tank was more work than
my typical tank. But I think that’s more because I’m lazy to a nirvanic-level than the tank really needed maintenance. I’m just not used to doing waterchanges religiously/weekly and switching out filters and so on. If you do that already, then this setup’s easy. I often go weeks or months without such maintenance on my other tanks (they look it too! D’oh!) so the regularity of this tank sort of irked me. Topping off constantly is also a bother for me. I long for a pico-sized ATO. <sigh>
The setup is a 2.5-gallon All-Glass tank. The rock was bleached fiji rock from my lfs’s toss-away bins. The substrate is caribsea’s crushed coral and fiji pink sand. The heater is a 25W Hagen. The only water movement is generated by an undergravel filter system (over)powered by a Whisper-40 air pump. Lighting was by sun.
IIRC, all of the corals were either aquacultured by me, two OLS’s (Seacrop and Coral Dynamics), or from the frag tanks of two LFS’s (Hanover Pet and Country Critters-Long Island) I "frequent". Many of the coral livestock below are in multiple colonies but I've only listed them singularly, e.g. there are actually two separate colonies of the tubiopora and probably a half-dozen colonies of the orange zoanthid.
Livestock:CoralSarcophyton elegans
Sarcophyton latum
Discosoma-Blue
Discosoma-Brown/Green (MIA)
Discosoma-Red
Palythoa-Green
Palythoa-Cream
Tubipora
Capnella
Clavularia #1
Clavularia #2 (previously mis-ID’d, same as above)
Clavularia viridis
Clove Polyps (in ill health)
Gorgonian-Purple
Stoloniferan #1-Pink
Stoloniferan #2
Stoloniferan #3 (aka ‘Moss’)
Caulastrea-Blue
Parazoanthus (Yellow Polyps)
Zoanthid-Blue
Zoanthid-Orange
Zoanthid-Red (mis-ID’d, same as Zoanthid-Orange)
Zoanthid-Pink/Violet
Zoanthid-Yellow
Zoanthid-Yellow/Orange
Zoanthid-Brown/Green (color changed to predominantly green)
Zoanthid-Green/Brown
Zoanthid-Green/Orange
Blue Xenia
Hydroids-Brown
SPS-Yellow (Unidentified)
Aiptasia
Livestock (other than Corals)
AlgaeChaetomorpha
Padina sp.
Amphoria fragilisima
Macrofauna(2) Astrae Snails
(3) Brittle Stars
(1) Stomatella Snail
MicrofaunaPhyllochaetopterus Worms
Ctenophores (casting line-type)
Copepods
Bristleworms
Mysis Shrimp
Feather Dusters
Below: initial setup pic (10-23-05), chalk-white rock and northern facing window (I was concerned of overexposure for the tank at the time).
Below: similar time frame (10-29-05) but moved into living room and a southern facing window.
Below: early front view (11-5-05), sorry for the glare/reflection.
Below: angled fts (11-8-05)
Below: overhead view showing condensation and splash from the bubbles
Below: another front view (12-4-05), lighting for correct pics was definitely an issue for me. Sometimes the pictures would be too blue or too red depending on overcast days or bright sunlight, respectively. That’s not even counting my very poor photo-skills, which I hope have improved through the contest.
Below: side views (12-4-05) were much easier to obtain good-looking (i.e. low/no glare) shots
Below: another angled fts (12-18-05), the bleach whiteness of the rock has been replaced with a biofilm and coralline is just starting to take hold.
Below: front fts (1-1-06), happy new year!
Below: front fts (1-22-06)
edit: the system said i exceeded my picture limit within a single post.
so this is just the other half.Below: front fts (2-11-06), I’m getting better on the glare as you can see.

[img]http://www.nano-reef.com/gallery/data/500/2006-0211-1.jpg[/img]
Below: side view fts (2-25-06)
[img]http://www.nano-reef.com/gallery/data/500/2006-0225-2.jpg[/img]
Below: angled fts (3-17-06), my short stint with an tall afro-canopy (changed it out within days).
[img]http://www.nano-reef.com/gallery/data/500/2006-0317-4.jpg[/img]
Below: new canopy closeup (3-24-06), new and improved low profile canopy.
[img]http://www.nano-reef.com/gallery/data/500/2006-0324-2.jpg[/img]
Below: side view fts (3-25-06)
[img]http://www.nano-reef.com/gallery/data/500/2006-0325-14.jpg[/img]
Below: side view fts (4-1-06), final shots right after contest end-date
[img]http://www.nano-reef.com/gallery/data/500/2006-0401-4.jpg[/img]
Below: front view fts (4-1-06),
NOTE: this is a cropped and spliced shot. What I did towards the end of the contest is take two pics of the front fts, ignoring the obvious glare/reflection, then cut/cropped two pictures (right & left) into one pic that minimized the glare/reflection. You can still see the slight seam line in the middle though. I didn’t say I was good at photoshop, I just wanted less glare from my honda in the driveway.

[img]http://www.nano-reef.com/gallery/data/500/2006-0401-14.jpg[/img]
Overall, I’ve been very happy with the setup and process. The contest forced/prodded me to be vigilant and conservative with my livestock additions (never did add the fish I wanted to). The ugf system was ok by-and-large. The
bubble geysers gave me some grief but overall I liked the randomness and easy/light flow of the bubbling versus a small powerhead.
One of the original concepts I wanted to incorporate into this setup was an emulation of Lee Eng Chin’s “natural method” utilizing bubbling action as the water flow. I’m not sure if I could apply his method effectively to a large traditional-type tank but I think I did a decent job imitating it here in a pico.
But I think the sunlight application proved out very well. I don’t think I’ll be doing another tank
without sunlight as a significant light source or as the
only light source from now on.
In fact, the very rich phytoplankton generation from this tank has me thinking of other corals and applications to combine with our “traditional” tanks. will advise!
Again, thanks for following along and the encouraging remarks. Both were very much appreciated!