I just bought a 55 gallon tank today. Filter/heater/thermometer/lamp/test kit included. I bought loads of plants, wood and hiding spots. I know it's a bit naked right now, but that was the best I could do with the limited time I had. My Pleco's are tiny in it and hopefully they won't out-grow the tank too fast, I love them and I would lvoe to keep them, even if impossible. There's a small chance I could keep an least one, I'll be so sad when I will have to get rid of them.
If you have any tips please feel free to post, I will need it. As I said, for now it's the best I can do and I think it's pretty good.
Not filled yet. My tank is in the desert!!

Not filled from another angle.

Still not filled.

Fileld with water (it took me a century and a lot of back pain to get it filled, I forgot the Vaccum and the water Pump...)

Filled from another angle.

I love the skull hiding place.

Filtered water.

With lights on.

With lights on again.

I will get more wood, plants and hiding places. I used solution to take out the Chlorine in water (I mostly used mineral and distilled water), added some nutrients into it. Check out the Ph/Amonia... levels. I put on the heater to 28 and half degres (it's getting there slowly) I used colder water so it will take time to get hotter, plus it's 27 degres here (as in my appartment, but I have an air conditionning and good areation, so it seems MUCH cooler) so it shouldn't take that long.
Anyways, anything specific I should do or get? Any tips and extra information is needed and wanted!