Errr..... I was going to tell you that it can easilty be done for way less than $300.00 if you do some
DIY stuff. You can build a
DIY CO2 for under $10.00. You can also go to Home Depot and get some 48" flourescent fixtures and bulbs. Get 2x two bulb fixtures and hang them over your tank. This gives you about 3wpg for about $20.00. So with some
DIY, you have converted your 55 gallon standard, into a 55 gallon planted. And, you are left with $270.00 for plants and fertilizers.
But.... you said no
DIY..... soo.......
For
CO2 - I have not used this item, but I have heard good things. I believe with a 55 gallon you will need 2 of them; 2x $21.99 = $44.00
http://www.bigalsonline.com/catalog/...d1=3349;pcid2=
For lights: THis is not the only, cheapest, or best choice - but it is a good choice.
http://www.hellolights.com/482xcofraq2x.html $106.29 - on sale
http://www.bigalsonline.com/catalog/...d1=1843;pcid2= $116.99 - same item
So by ordering online, you are at about $150.00 (plus Shipping). And you have a little over 2wpg - which is still plenty of light for most plants.
Don't forget fertilizers - Start with Flourish, and then as you gain experience you will want to move to ferts that give you more control.