i can understand how you would want to retain the look of the eye candy in the middle section with the lights n stuff though.
i'd go with 2 clear hoses (one draining, one filling) because the clear pipe would be less visible than any solid coloured pipe.
you could also fit an airline while your at it.
maybe, just maybe, rather than having 2 hoses + an air line grouped together up the middle, you may be able to put all those hoses inside of one larger clear rubber pipe to contain it all as one pipe.
what i'd hope you'd end up with is one larger clear tube straight up the middle, with a nice rounded shape rather than a group of pipes together.
or maybe even get some brightly coloured silicone tube to add to the look, you can get it up to 100mm ID if needed !
-- silicone tube --
(4ft) 79g / 285L AquaGrande 120 main tank
(4ft) 52g / 192L Fry/brooding tank
(2ft) 19g/ 75L Fry/brooding tank
theyre fully cich'lid, bro!