QUOTE (Mr. Fosi @ May 21 2009, 09:52 AM)

Just like a reef tank, before you set this tank up you should decide what you want to keep.
Not all plants require the same lighting or water conditions (soft vs. hard, high pH vs. low). They also don't all require the same type of fertilization strategy. They also aren't all the same cost and if you want to have a successful, algae-free tank you need to initially plant as densely as possible and leave out the fish until the plants become established.
Some plants will root deeply, others won't so you have to plan out how deep the substrate will be and what it will be composed of. Fluorite is a great suggestion and if you go with the red, it compliments the green of the plants very nicely.
Also think about whether you will want to worry about CO2 or liquid fertilizer addition.
Why don't you post a list of plants you want to keep? Then we can decide what sort of setup you need.
+1
I have a 55 gallon planted tank that has taken me years to get right, and Mr. Fosi couldn't be more right. Plant heavy at first, or you will be fighting a long war!
I recommend the flourite substrate, it is very good stuff. Most plants require 2wpg to survive, and a little more to thrive. I have 4wpg on my tank with CO2 injection. But again, it all depends on what you want to keep. A basic generalization here is that plants with a red color require more light 3+ wpg.
Ditch the 50/50 powercompact, the actinic will create an infestation of algae. Yeah, it looks cool, but trust me, been down that road...
Unlike a reef tank where NO3 and PO4 are the devil, both are macronutrients in a planted tank. You must have sources of these if you want your plants to live. You get both of these from fish food and fish waste. Fertilization is usually not necessary if you keep some good waste producing fish. Potassium is also a very important macro that needs to be present in your water. Supplementation may be necessary here.
As far as clean up goes, cory cats and ottos are a planted tanks best friend. DO NOT get a pleco. They need really big tanks, I'm talking 75+ gallons. They get huge. Don't get one!
Water source is important too. To keep plants, water hardness is key as most don't do well at a hardness of over 150ppm. A good idea is to use a mix of RO and tap water to get your hardness right for the species of plants you plan to keep. A lot of nice fish that go great in planted tanks don't do well in hard water either; neon tetras for example. I mix 50/50 RO and tap. Just make sure your tap water is chlorine free.
As far as carbon goes, I don't use it currently. Have in the past, but don't find it necessary.
Water changes are crucial. Do them on a regular basis.
Hope this helps.