Did another 75 Gallon water change today, time flies so quickly.  I came back from a 4 day weekend during thanksgiving to 2 of my fish having ich....  hopefully it'll bet better.  I usually feed with garlic and vitamin soaked foods, but didn't feed for 4 days while I was away.
Anyway, I never did post pictures of my water change contraption.  I posted previously of how I do my 15 minute 75 gallon water change and here is where it begins - draining the 75 gallon tank.  This is simple, but it works:
The siphon tube:
And here is where it ends up 
Thanks for looking.