I have finally complered my move to the new house and although my 450 is hprwappy i have started the preparation for my tl550 . I am excited because it is nearly triple the volume of 450. First things first. i found that any water dripped on stand causes it to swell. so with thie tank i have sealed toe stand with a wood sealer before even starting. the first thing i am doing is going led on the tank. i have 3,2 metres of 24 volt 5050 leds half are 7000 kelvin( i hear some people groan. The reason for the choice of this colour rating is the amount of usable lights for corals.) the other half of the leds are 20 000 kelvin. this is to ensure penetration and to offset the yellow of the 7000 kelvin. ps sunlight is approx 7000 kelvin. the total wattage is 42 watts and is 25 percent overkill according to what i have read. this will ensure i can keep anything in the tank as far as corals and spses go.