really tho why not a waste water pipe like you see on the side of the rd when they are replacing draind etc, i'm sure you could pick up an offcut, BTW they make awesome trickle towers & don't cost $400.
Who gives a flying hoot as long as we are all happy with our corals
BTW I picked up 1250L of FRESH Takapuna water tonight did a wee change on the growout system a bit murky but i just dont care
try to wait Chris as yr tank is still very new with little load & if you add fish you will get more nitrite spikes, also keep doing the water changes regularly.