Vacation plans and many tank pictures

In a week I have to move out of my college apartment for the winter break. I will be gone from the December 11th until January 4th or 5th. I would like to leave my 10 gallon fish tank in the apartment for this time, the tank is probably 3 months old:
2 15W fluorescent tubes, one is really old and probably deteriorated to ~10W, so ~25W total. They are resting on a plastic sheet (from a cheap picture frame) secured by angle aluminum.
Penguin 550 (145 gph) pulling water through a homemade sponge filter

3 black molly fry, 5/8"-3/4" in length
MTS and Pond snails

Water Sprite (growing very fast)
Windelov Java Fern (new growth is coming in light-green)
Needleleaf Java Fern (new growth is coming in light-green)
Ludwigia (was growing well, but coming in yellow, new growth is starting to color in red since I added the 2nd fluorescent light)
Pellia (growing pretty fast)
Christmas moss (growing very fast)
Corkscrew Val (growing very poorly)

I have gone about a week and a half without giving the mollies food, and there were no casualties. The found plenty to eat in there. Could they be fine in there for the 3+ weeks I will be gone?

The plants, I feel like they are in need of some fertilizer. I have never given them any ferts or additional CO2, and each plant has grown. I had an algae bloom a couple weeks ago, then I upgraded my air-driven sponge to a power head and did a rather large water change, it hasn't returned since.
Since I won't be here to add ferts, would root-tabs (for pond plants) provide all the nutrients these plants need? I am worried most about my ludwigia and my valisnaria, and I won't put them anywhere near the water sprite, it grows too well. I am tempted to just remove the Val, it is in the 2nd to last picture.

The first picture is of a 1 gallon former pickle jar that I have clippings of most of the plants in, I will be taking this with me. It has a CFL desk lamp over a small piece of plastic. There are some baby pond snails and at least 1 MTS in there.

The last picture is kind of a bonus "Identify this" picture. This little invert arrived on some plants, and I only ever see it at night. There were two of them in the tank at one time, and I haven't seen one since I took this picture over a week ago. There are pieces of Pellia in the background, and that is a coconut shell half to the left. The thing might be 3/8" long, it looks like a shrimp with it's tail held underneath it. What kind of crustacean could this be?

I thought about one, and I would probably find one that ran off AC, and put it behind my light timer so that I could further slow it down. How long of a time interval is a full revolution?
The biggest difficulty however is my tank 'hood doesn't have any open room, I'd have to eliminate a light fixture (I have a bar that used to be 2 incandescent, so I could pop in two CFLs and do this) and cut a hole in the plastic for a feeder. I have a couple different covers to try, but the current makeshift one is the only one that could fit the two fluorescent tubes above it.

Another person is impossible, the keys are are electronic, and they say that they will be turning off the doors on the 11th and turning them on in January. I am going to be up here for a few things during the break (15th, 19th, 24th), so if they are bluffing and I can get in then, I will to change some water and feed. This is just a worst case scenario, which I am planning on.

Should I do several large water changes in the coming days beforehand to get as much old water out as possible? (2 50% changes would yield a 75% change, 2 75% yield a 94%)

What kind of filtration would you suggest for the pickle jar if I was to do that?
I currently have a single air hose going in just for surface agitation. I could build one of those small lift-tube based filters out of a film canister or something, I could even pack more water sprite and/or Christmas Moss into the jar.
My roommate has a 1 gallon corner style tank that is unused since his fish died (the mother of these mollies). I assume the additional surface are would help, but I don't think I have enough time to really get an under-gravel filter seeded. Could a larger mass of the aforementioned plants accomplish the filtration I need? (special points for Christmas Moss being "in season")

Taking at least 1-3 of the fish with me now seems to be the best approach, but what about filtration? My current filter probably has almost no beneficial bacteria due to the high plant-count, and it is far too large to fit in any smaller container. The break is only a week away, I'd have to go and seed the filter in someone else's tank or steal some gravel.
I assume if I packed the 3 fry into 1 gallon I would need multiple water changes per week, even with the addition of extra plant matter. I'll see if my roommate would mind me taking his 1 gallon for the break, it's not as tall as the jar, and is wider.

theotheragentm, I don't currently have any fertilizers now, and I am only willing to buy the root-tabs right now. I've read some about mixing my own dry solutions, which I would like to do, but I want to wait until the spring when I am back at school to do any major chemistry changes.
Does anyone know if the tabs provide macro-nutrients, micro-nutrients, or both?
If I contain them in the sand bed they shouldn't affect anything living in the water column (like random shrimp-thing up there), in addition to preventing a huge algae bloom.

I'm going to go and ask the office for my apartment if they are really shutting off the doors or not, hopefully not. If that is the case, I will be up here often enough to feed and change water. (4 days, 4 days, 5 days, 10 days)
As long as doors are turned on, I can see how the fish are doing on Christmas eve, and possibly take them home for the 10 day interval.